Teslaphoresis of Carbon Nanotubes
- Lindsey R. Bornhoeft
- ,
- Aida C. Castillo
- ,
- Preston R. Smalley
- ,
- Carter Kittrell
- ,
- Dustin K. James
- ,
- Bruce E. Brinson
- ,
- Thomas R. Rybolt
- ,
- Bruce R. Johnson
- ,
- Tonya K. Cherukuri
- , and
- Paul Cherukuri
Abstract
This paper introduces Teslaphoresis, the directed motion and self-assembly of matter by a Tesla coil, and studies this electrokinetic phenomenon using single-walled carbon nanotubes (CNTs). Conventional directed self-assembly of matter using electric fields has been restricted to small scale structures, but with Teslaphoresis, we exceed this limitation by using the Tesla coil’s antenna to create a gradient high-voltage force field that projects into free space. CNTs placed within the Teslaphoretic (TEP) field polarize and self-assemble into wires that span from the nanoscale to the macroscale, the longest thus far being 15 cm. We show that the TEP field not only directs the self-assembly of long nanotube wires at remote distances (>30 cm) but can also wirelessly power nanotube-based LED circuits. Furthermore, individualized CNTs self-organize to form long parallel arrays with high fidelity alignment to the TEP field. Thus, Teslaphoresis is effective for directed self-assembly from the bottom-up to the macroscale.
Results and Discussion
Conclusions
Methods
TEP System
TEP Directed CNT Assembly and Wirelessly Powered Nanotube-Based Circuits
TEP Directed Self-Assembly of individual CNTs
Characterization
Supporting Information
The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acsnano.6b02313.
Additional experimental data (PDF)
Movie S1 (MPG)
Movie S2 (MPG)
Movie S3 (MPG)
Movie S4 (MPG)
Movie S5 (MPG)
Movie S6 (MPG)
Movie S7 (MPG)
Terms & Conditions
Most electronic Supporting Information files are available without a subscription to ACS Web Editions. Such files may be downloaded by article for research use (if there is a public use license linked to the relevant article, that license may permit other uses). Permission may be obtained from ACS for other uses through requests via the RightsLink permission system: http://pubs.acs.org/page/copyright/permissions.html.
Acknowledgment
This work was supported in part by the Department of Chemistry and Physics at the University of Tennessee—Chattanooga and Rice University. The authors are grateful to M. McShane and R. Weisman for generous use of their visible and NIR microscopes. The authors are also grateful to the following individuals for their inspiration and helpful discussions: A.-J. Cherukuri, J. Rogers, D. Natelson, J. Hafner, K. Kelly, S. Sanchez, S. Curley, J. Tour, M. Stone, R. Zimmerman, and J. Kanzius.
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26Corr, S.; Raoof, M.; Cisneros, B.; Orbaek, A.; Cheney, M.; Law, J.; Lara, N.; Barron, A.; Wilson, L.; Curley, S. Radiofrequency Electric-Field Heating Behaviors of Highly Enriched Semiconducting and Metallic Single-Walled Carbon Nanotubes Nano Res. 2015, 8, 2859– 2870 DOI: 10.1007/s12274-015-0791-1Google Scholar26https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BC2MXht1eksr7J&md5=9d67b9f842488a850e4c419e25258f9dRadiofrequency electric-field heating behaviors of highly enriched semiconducting and metallic single-walled carbon nanotubesCorr, Stuart J.; Raoof, Mustafa; Cisneros, Brandon T.; Orbaek, Alvin W.; Cheney, Matthew A.; Law, Justin J.; Lara, Nadia C.; Barron, Andrew R.; Wilson, Lon J.; Curley, Steven A.Nano Research (2015), 8 (9), 2859-2870CODEN: NRAEB5; ISSN:1998-0000. (Springer GmbH)It is theorized that enhanced thermal heating may result from exposing single-walled carbon nanotubes (SWNTs) embedded in a conductive host to radiofrequency (RF) elec. fields. We examine the RF-induced (13.56 MHz) heating behaviors of 95% metallic- and semiconducting-enriched SWNTs (m-/s-SWNTs) suspended in aq. solns. with varying NaCl molarity (0.001 mM-1 M). The heating effects were only evident for host molarities below 1 mM (equiv. to 0.1 S/m) at which the s-SWNT heating rates dominated those of the m-SWNTs. The heating effects were localized to aligned and aggregated "SWNT ropes" ∼1 cm in length that formed in suspension, parallel to the elec.-field vector, during the RF exposure. For molarities above 1 mM, no enhancements were evident, owing to the large heating effects of the bulk ionic NaCl suspensions, which were obsd. in previous studies. Although larger enhancement effects proportional to the host cond. have been theor. predicted for m-/s-SWNT suspensions, this was not obsd. most likely because of the aggregation and screening effects, which diminished the scattered elec. field near the m-/s-SWNTs. Our research may further the development of better nanoparticle heating agents for applications such as non-invasive RF-induced cancer hyperthermia. [Figure not available: see fulltext.].
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30Pokorny, P.; Kostakova, E.; Sanetrnik, F.; Mikes, P.; Chvojka, J.; Kalous, T.; Bilek, M.; Pejchar, K.; Valtera, J.; Lukas, D. Effective AC Needleless and Collectorless Electrospinning for Yarn Production Phys. Chem. Chem. Phys. 2014, 16, 26816– 26822 DOI: 10.1039/C4CP04346DGoogle Scholar30https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BC2cXhslOisL3I&md5=e294fe62eb8f60aa7dff18129fa1be77Effective AC needleless and collectorless electrospinning for yarn productionPokorny, P.; Kostakova, E.; Sanetrnik, F.; Mikes, P.; Chvojka, J.; Kalous, T.; Bilek, M.; Pejchar, K.; Valtera, J.; Lukas, D.Physical Chemistry Chemical Physics (2014), 16 (48), 26816-26822CODEN: PPCPFQ; ISSN:1463-9076. (Royal Society of Chemistry)Nanofibrous materials are essential components for a wide range of applications, particularly in the fields of medicine and material engineering. These include protective materials, sensors, cosmetics, hygiene, filtration and energy storage. The most widely used and researched technol. in these fields is electrospinning. This method for producing fibers yields highly promising results thanks to its versatility and simplicity. Electrospinning is employed in multiple forms, among which needle and needleless d.c. (DC) variants are the most distinctive. The former is based on the generation of just one single jet from a nozzle; hence this fabrication process is not very productive. The latter uses the destabilization of free liq. surfaces by means of an elec. field, which enhances the throughput since it produces numerous jets, emitted from the surfaces of rollers, spheres, strings and spirals. However, although some progress in total producibility has been achieved, the efficiency of the DC method still remains relatively low. A further drawback of DC electrospinning is that both variants need a collector, which makes it difficult to combine DC electrospinning easily with other technologies due to the presence of the high field strength within the entire spinning zone. This paper describes our expts. with AC electrospinning. We show that a.c. (AC) electrospinning based on a needleless spinning-electrode provides a highly productive smoke-like aerogel composed of nanofibers. This aerogel rises rapidly from the electrode like a thin plume of smoke, without any need for a collector. Our work shows that AC needleless electrospinning gains its efficiency and collector-less feature thanks to the creation of a perpetually charge-changing virtual counter-electrode composed of the nanofibers emitted. High-speed camera recordings demonstrate the formation mechanism of the nanofibrous plume, which is wafted by an elec. wind. This wind's velocity field is exptl. investigated. One potential use of AC needleless electrospinning is demonstrated here by spinning it into a yarn.
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31Vijayaraghavan, A. A. Bottom-Up Assembly of Nano-Carbon Devices by Dielectrophoresis Phys. Status Solidi B 2013, 250, 2505– 2517 DOI: 10.1002/pssb.201300565Google ScholarThere is no corresponding record for this reference.
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32Cherukuri, P.; Gannon, C. J.; Leeuw, T. K.; Schmidt, H. K.; Smalley, R. E.; Curley, S. A.; Weisman, R. B. Mammalian Pharmacokinetics of Carbon Nanotubes Using Intrinsic Near-Infrared Fluorescence Proc. Natl. Acad. Sci. U. S. A. 2006, 103, 18882– 18886 DOI: 10.1073/pnas.0609265103Google Scholar32https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BD28XhtlChurfK&md5=fe8c7343fbc326ee0d2d7c161fff1ac8Mammalian pharmacokinetics of carbon nanotubes using intrinsic near-infrared fluorescenceCherukuri, Paul; Gannon, Christopher J.; Leeuw, Tonya K.; Schmidt, Howard K.; Smalley, Richard E.; Curley, Steven A.; Weisman, R. BruceProceedings of the National Academy of Sciences of the United States of America (2006), 103 (50), 18882-18886CODEN: PNASA6; ISSN:0027-8424. (National Academy of Sciences)Individualized, chem. pristine single-walled carbon nanotubes were i.v. administered to rabbits and monitored through their characteristic near-IR fluorescence. Spectra indicated that blood proteins displaced the nanotube coating of synthetic surfactant mols. within seconds. The nanotube concn. in the blood serum decreased exponentially with a half-life of 1.0 ± 0.1 h. No adverse effects from low-level nanotube exposure could be detected from behavior or pathol. examn. At 24 h after i.v. administration, significant concns. of nanotubes were found only in the liver. These results demonstrate that debundled single-walled carbon nanotubes are high-contrast near-IR fluorophores that can be sensitively and selectively tracked in mammalian tissues using optical methods. In addn., the absence of acute toxicity and promising circulation persistence suggest the potential of carbon nanotubes in future pharmaceutical applications.
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33Loeb, L. B. Electrical Coronas: Their Basic Physical Mechanism; University of California Press: Berkeley, CA, 1965.Google ScholarThere is no corresponding record for this reference.
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34Smith, B. D.; Mayer, T. S.; Keating, C. D. Deterministic Assembly of Functional Nanostructures Using Nonuniform Electric Fields Annu. Rev. Phys. Chem. 2012, 63, 241– 263 DOI: 10.1146/annurev-physchem-032210-103346Google Scholar34https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BC38Xnt1Glu74%253D&md5=71eca2a270ad3523807141fa85437aebDeterministic assembly of functional nanostructures using nonuniform electric fieldsSmith, Benjamin D.; Mayer, Theresa S.; Keating, Christine D.Annual Review of Physical Chemistry (2012), 63 (), 241-263CODEN: ARPLAP; ISSN:0066-426X. (Annual Reviews Inc.)A review. The force induced on anisotropic nanoparticles in a nonuniform elec. field can be used to attract, orient, and position the nanoparticles with respect to microelectrodes on a surface. For polarizable nanomaterials, such as nanowires, carbon nanotubes, or graphene sheets suspended in solvent, this dielectrophoretic force results in movement to regions of highest elec. field strength. This review discusses the origin of this force, its prodn. by different microelectrode designs, and its use for nanomaterials assembly, with a focus on efforts toward heterogeneous integration with on-chip electronics for single-particle characterization and device structures.
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35Jefimenko, O. Demonstration of the Electric Fields of Current-Carrying Conductors Am. J. Phys. 1962, 30, 19– 21 DOI: 10.1119/1.1941887Google ScholarThere is no corresponding record for this reference.
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36Leeuw, T. K.; Tsyboulski, D. A.; Nikolaev, P. N.; Bachilo, S. M.; Arepalli, S.; Weisman, R. B. Strain Measurements on Individual Single-Walled Carbon Nanotubes in a Polymer Host: Structure-Dependent Spectral Shifts and Load Transfer Nano Lett. 2008, 8, 826– 831 DOI: 10.1021/nl072861cGoogle Scholar36https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BD1cXisVWlu7g%253D&md5=8bb2e1ee6ac89a92993f1b7cfb454f6aStrain Measurements on Individual Single-Walled Carbon Nanotubes in a Polymer Host: Structure-Dependent Spectral Shifts and Load TransferLeeuw, Tonya K.; Tsyboulski, Dmitri A.; Nikolaev, Pavel N.; Bachilo, Sergei M.; Arepalli, Sivaram; Weisman, R. BruceNano Letters (2008), 8 (3), 826-831CODEN: NALEFD; ISSN:1530-6984. (American Chemical Society)The fluorescence of individual semiconducting single-walled C nanotubes embedded in polymer films was measured during the application of controlled stretching and compressive strains. Nanotube band gaps shift in systematic patterns that depend on the (n,m) structural type and are in agreement with the predictions of theor. models. Loss of nanotube-host adhesion was revealed by abrupt irregularities in plots of spectral shift vs. strain.
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37
For example: glass beads, polystyrene, carbon black, gold, graphite, wax, silica beads.
There is no corresponding record for this reference. -
38Blatt, S.; Hennrich, F.; Lohneysen, H.; Kappes, M. M.; Vijayaraghavan, A.; Krupke, R. Influence of Structural and Dielectric Anisotropy on the Dielectrophoresis of Single-Walled Carbon Nanotubes Nano Lett. 2007, 7, 1960– 1966 DOI: 10.1021/nl0706751Google ScholarThere is no corresponding record for this reference.
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39Sarker, B. K.; Shekhar, S.; Khondaker, S. I. Semiconducting Enriched Carbon Nanotube Aligned Arrays of Tunable Density and Their Electrical Transport Properties ACS Nano 2011, 5, 6297– 6305 DOI: 10.1021/nn201314tGoogle Scholar39https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BC3MXovFKlsLg%253D&md5=b15fb544a33be7ed8b20ce296ec98ea3Semiconducting Enriched Carbon Nanotube Aligned Arrays of Tunable Density and Their Electrical Transport PropertiesSarker, Biddut K.; Shekhar, Shashank; Khondaker, Saiful I.ACS Nano (2011), 5 (8), 6297-6305CODEN: ANCAC3; ISSN:1936-0851. (American Chemical Society)The authors demonstrate assembly of soln.-processed semiconducting enriched (99%) single-walled carbon nanotubes (s-SWNTs) in an array with varying linear d. via a.c. dielectrophoresis (DEP) and study detailed electronic transport properties of the fabricated devices. (i) the quality of the alignment varies with frequency of the applied voltage and (ii) by varying the frequency and concn. of the soln., the authors can control the linear d. of the s-SWNTs in the array from 1/μm to 25/μm. The DEP assembled s-SWNT devices provide the opportunity to study the transport property of the arrays in the direct transport regime. Room temp. electron transport measurements of the fabricated devices show that with increasing nanotube d. the device mobility increases while the current on-off ratio decreases dramatically. For the dense array, the device c.d. was 16 μA/μm, on-conductance was 390 μS, and sheet resistance was 30 kΩ/.box.. These values are the best reported so far for any semiconducting nanotube array.
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40Brothers, E. N.; Scuseria, G. E.; Kudin, K. N. Longitudinal Polarizability of Carbon Nanotubes J. Phys. Chem. B 2006, 110, 12860– 12864 DOI: 10.1021/jp0603839Google ScholarThere is no corresponding record for this reference.
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41Dierking, I.; Scalia, G.; Morales, P. Liquid Crystal-Carbon Nanotube Dispersions J. Appl. Phys. 2005, 97, 044309 DOI: 10.1063/1.1850606Google Scholar41https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BD2MXhtlWksb8%253D&md5=837ad9d43a4b4a479517b2f6a73baf49Liquid crystal-carbon nanotube dispersionsDierking, I.; Scalia, G.; Morales, P.Journal of Applied Physics (2005), 97 (4), 044309/1-044309/5CODEN: JAPIAU; ISSN:0021-8979. (American Institute of Physics)Parallel alignment of nanotubes can be obtained by dispersion in a self-organizing anisotropic fluid such as a nematic liq. crystal. Exploiting the cooperative reorientation of liq. crystals, the overall direction of the nanotube alignment can be controlled both statically and dynamically by the application of external fields. These can be elec., magnetic, mechanic, or even optic in nature. Employing multiwall as well as single-wall C nanotubes, we show their parallel alignment along a uniform liq. crystal director field and elec. verify their reorientation behavior for two complementary geometries. These demonstrate elec. controlled C nanotube OFF-ON and ON-OFF switches. Further application potential will be outlined.
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42Hong, S.; Banks, T.; Rogers, J. Improved Density in Aligned Arrays of Single-Walled Carbon Nanotubes by Sequential Chemical Vapor Deposition on Quartz Adv. Mater. 2010, 22, 1826– 1830 DOI: 10.1002/adma.200903238Google Scholar42https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BC3cXlt1GgurY%253D&md5=e4f3484ebe06d29cf1ce08a1dde556edImproved Density in Aligned Arrays of Single-Walled Carbon Nanotubes by Sequential Chemical Vapor Deposition on QuartzHong, Suck Won; Banks, Tony; Rogers, John A.Advanced Materials (Weinheim, Germany) (2010), 22 (16), 1826-1830CODEN: ADVMEW; ISSN:0935-9648. (Wiley-VCH Verlag GmbH & Co. KGaA)A process of forming densely aligned single walled carbon nanotubes (SWNT) using sequential chem. vapor deposition is discussed. This process uses a lithog. pattern of catalytic iron oxide followed by CVD. The process is continued selective removal of SWNT from the areas adjacent to the iron oxide followed by a subsequent CVD for deposition of more SWNT. This process can be used for the formation of electronic components such as the demonstrated transistors made out of SWNT arrays.
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43Shulaker, M. M.; Hills, G.; Patil, N.; Wei, H.; Chen, H.-Y.; Wong, H.-S. P.; Mitra, S. Carbon Nanotube Computer Nature 2013, 501, 526– 530 DOI: 10.1038/nature12502Google Scholar43https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BC3sXhsFWms7jO&md5=20d497c54ec66c9c265b214aa4c6eccdCarbon nanotube computerShulaker, Max M.; Hills, Gage; Patil, Nishant; Wei, Hai; Chen, Hong-Yu; Wong, H.-S. Philip; Mitra, SubhasishNature (London, United Kingdom) (2013), 501 (7468), 526-530CODEN: NATUAS; ISSN:0028-0836. (Nature Publishing Group)A review. The miniaturization of electronic devices has been the principal driving force behind the semiconductor industry, and has brought about major improvements in computational power and energy efficiency. Although advances with silicon-based electronics continue to be made, alternative technologies are being explored. Digital circuits based on transistors fabricated from carbon nanotubes (CNTs) have the potential to outperform silicon by improving the energy-delay product, a metric of energy efficiency, by more than an order of magnitude. Hence, CNTs are an exciting complement to existing semiconductor technologies. Owing to substantial fundamental imperfections inherent in CNTs, however, only very basic circuit blocks have been demonstrated. Here we show how these imperfections can be overcome, and demonstrate the first computer built entirely using CNT-based transistors. The CNT computer runs an operating system that is capable of multitasking: as a demonstration, we perform counting and integer-sorting simultaneously. In addn., we implement 20 different instructions from the com. MIPS instruction set to demonstrate the generality of our CNT computer. This exptl. demonstration is the most complex carbon-based electronic system yet realized. It is a considerable advance because CNTs are prominent among a variety of emerging technologies that are being considered for the next generation of highly energy-efficient electronic systems.
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44Behabtu, N.; Young, C. C.; Tsentalovich, D. E.; Kleinerman, O.; Wang, X.; Ma, A. W. K.; Bengio, E. A.; ter Waarbeek, R. F.; de Jong, J. J.; Hoogerwerf, R. E.; Fairchild, S. B.; Ferguson, J. B.; Maruyama, B.; Kono, J.; Talmon, Y.; Cohen, Y.; Otto, M. J.; Pasquali, M. Strong, Light, Multifunctional Fibers of Carbon Nanotubes with Ultrahigh Conductivity Science 2013, 339, 182– 186 DOI: 10.1126/science.1228061Google Scholar44https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BC3sXjvVCgtg%253D%253D&md5=4d1c97f302cd69f4f5d23d8aff7b67fbStrong, Light, Multifunctional Fibers of Carbon Nanotubes with Ultrahigh ConductivityBehabtu, Natnael; Young, Colin C.; Tsentalovich, Dmitri E.; Kleinerman, Olga; Wang, Xuan; Ma, Anson W. K.; Bengio, E. Amram; ter Waarbeek, Ron F.; de Jong, Jorrit J.; Hoogerwerf, Ron E.; Fairchild, Steven B.; Ferguson, John B.; Maruyama, Benji; Kono, Junichiro; Talmon, Yeshayahu; Cohen, Yachin; Otto, Marcin J.; Pasquali, MatteoScience (Washington, DC, United States) (2013), 339 (6116), 182-186CODEN: SCIEAS; ISSN:0036-8075. (American Association for the Advancement of Science)Broader applications of carbon nanotubes to real-world problems have largely gone unfulfilled because of difficult material synthesis and laborious processing. We report high-performance multifunctional carbon nanotube (CNT) fibers that combine the specific strength, stiffness, and thermal cond. of carbon fibers with the specific elec. cond. of metals. These fibers consist of bulk-grown CNTs and are produced by high-throughput wet spinning, the same process used to produce high-performance industrial fibers. These scalable CNT fibers are positioned for high-value applications, such as aerospace electronics and field emission, and can evolve into engineered materials with broad long-term impact, from consumer electronics to long-range power transmission.
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45Cademartiri, L.; Bishop, K. J. M. Programmable Self-Assembly Nat. Mater. 2014, 14, 2– 9 DOI: 10.1038/nmat4184Google ScholarThere is no corresponding record for this reference.
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1Stokes, P.; Khondaker, S. I. High Quality Solution Processed Carbon Nanotube Transistors Assembled by Dielectrophoresis Appl. Phys. Lett. 2010, 96, 083110 DOI: 10.1063/1.3327521There is no corresponding record for this reference.
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2Shekhar, S.; Stokes, P.; Khondaker, S. I. Ultrahigh Density Alignment of Carbon Nanotube Arrays by Dielectrophoresis ACS Nano 2011, 5, 1739– 1746 DOI: 10.1021/nn102305z2https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BC3MXitVSiu7o%253D&md5=a166701a382a6c8f617be3990273f435Ultrahigh Density Alignment of Carbon Nanotube Arrays by DielectrophoresisShekhar, Shashank; Stokes, Paul; Khondaker, Saiful I.ACS Nano (2011), 5 (3), 1739-1746CODEN: ANCAC3; ISSN:1936-0851. (American Chemical Society)The authors report ultrahigh d. assembly of aligned single-walled carbon nanotube (SWNT) two-dimensional arrays via a.c. dielectrophoresis using high-quality surfactant-free and stable SWNT solns. After optimization of frequency and trapping time, the authors can reproducibly control the linear d. of the SWNT between prefabricated electrodes from 0.5 SWNT/μm to >30 SWNT/μm by tuning the concn. of the nanotubes in the soln. The authors' max. d. of 30 SWNT/μm is the highest for aligned arrays via any soln. processing technique reported so far. Further increase of SWNT concn. results in a dense array with multiple layers. How the orientation and d. of the nanotubes vary with concns. and channel lengths are discussed. Elec. measurement data show that the densely packed aligned arrays have low sheet resistances. Selective removal of metallic SWNTs via controlled elec. breakdown produced field-effect transistors with high current on-off ratio. Ultrahigh d. alignment reported here will have important implications in fabricating high-quality devices for digital and analog electronics.
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3Islam, M. R.; Kormondy, K. J.; Silbar, E.; Khondaker, S. I. A General Approach for High Yield Fabrication of CMOS-Compatible All-Semiconducting Carbon Nanotube Field Effect Transistors Nanotechnology 2012, 23, 125201– 125208 DOI: 10.1088/0957-4484/23/12/125201There is no corresponding record for this reference.
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4Krupke, R.; Linden, S.; Rapp, M.; Hennrich, F. Thin Films of Metallic Carbon Nanotubes Prepared by Dielectrophoresis Adv. Mater. 2006, 18, 1468– 1470 DOI: 10.1002/adma.2006001344https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BD28XlvVOgu78%253D&md5=d56514ae9c63e5afe952796071a5a3a4Thin films of metallic carbon nanotubes prepared by dielectrophoresisKrupke, Ralph; Linden, Stefan; Rapp, Michael; Hennrich, FrankAdvanced Materials (Weinheim, Germany) (2006), 18 (11), 1468-1470CODEN: ADVMEW; ISSN:0935-9648. (Wiley-VCH Verlag GmbH & Co. KGaA)Dielectrophoretic sepn. of metallic carbon nanotubes from semiconducting carbon nanotubes is developing towards a bulk-sepn. method, which allows, for the first time, the prodn. of thin films of only metallic single-walled carbon nanotubes on a transparent quartz glass substrate. Larger quantities of nanotubes are processed without sacrificing the intrinsic high quality of the process-a development that is promising for the development of nanotube-based electronic-device applications.
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5Vijayaraghavan, A.; Blatt, S.; Weissenberger, D.; Oron-Carl, M.; Hennrich, F.; Gerthsen, D.; Hahn, H.; Krupke, R. Ultra-Large-Scale Directed Assembly of Single-Walled Carbon Nanotube Devices Nano Lett. 2007, 7, 1556– 1560 DOI: 10.1021/nl07037275https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BD2sXkvFKlsLg%253D&md5=6c701f52d3395a0f6a0b44d05d194dacUltra-Large-Scale Directed Assembly of Single-Walled Carbon Nanotube DevicesVijayaraghavan, Aravind; Blatt, Sabine; Weissenberger, Daniel; Oron-Carl, Matti; Hennrich, Frank; Gerthsen, Dagmar; Hahn, Horst; Krupke, RalphNano Letters (2007), 7 (6), 1556-1560CODEN: NALEFD; ISSN:1530-6984. (American Chemical Society)One of the biggest limitations of conventional carbon nanotube device fabrication techniques is the inability to scale up the processes to fabricate a large no. of devices on a single chip. We demonstrate the directed and precise assembly of single-nanotube devices with an integration d. of several million devices per square centimeter, using a novel aspect of nanotube dielectrophoresis. We show that the dielectrophoretic force fields change incisively as nanotubes assemble into the contact areas, leading to a reproducible directed assembly which is self-limiting in forming single-tube devices. Their functionality has been tested by random sampling of device characteristics using microprobes.
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6Wang, M. C.P.; Gates, B. D. Directed Assembly of Nanowires Mater. Today 2009, 12, 34– 43 DOI: 10.1016/S1369-7021(09)70158-06https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BD1MXptlKgt70%253D&md5=c092a5366eb34eef68aa19f55d0f0053Directed assembly of nanowiresWang, Michael C. P.; Gates, Byron D.Materials Today (Oxford, United Kingdom) (2009), 12 (5), 34-43CODEN: MTOUAN; ISSN:1369-7021. (Elsevier Ltd.)A review. Nanowires of a diverse range of compns. with tailored phys. properties can be produced through synthetic means. These structures have been used as key components in flexible electronics, electronic logic gates, renewable energy technologies, and biol. or gas sensing applications. Integrating these nanostructures into device or technol. platforms will complement existing nanofabrication procedures by broadening the types of nanostructured materials that are utilized in device fabrication. This integration requires an ability to assemble these nanowires as controllable building blocks. Techniques are being developed that can quickly manipulate large quantities of nanowires through parallel processes.
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7Smith, P. A.; Nordquist, C. D.; Jackson, T. N.; Mayer, T. S.; Martin, B. R.; Mbindyo, J.; Mallouk, T. E. Electric-Field Assisted Assembly and Alignment of Metallic Nanowires Appl. Phys. Lett. 2000, 77, 1399– 1401 DOI: 10.1063/1.12902727https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BD3cXlvFKksLY%253D&md5=9c16e96cbc02ff536d882ccc4f8952e5Electric-field assisted assembly and alignment of metallic nanowiresSmith, Peter A.; Nordquist, Christopher D.; Jackson, Thomas N.; Mayer, Theresa S.; Martin, Benjamin R.; Mbindyo, Jeremiah; Mallouk, Thomas E.Applied Physics Letters (2000), 77 (9), 1399-1401CODEN: APPLAB; ISSN:0003-6951. (American Institute of Physics)This letter describes an elec.-field assisted assembly technique used to position individual nanowires suspended in a dielec. medium between two electrodes defined lithog. on a SiO2 substrate. During the assembly process, the forces that induce alignment are a result of nanowire polarization in the applied alternating elec. field. This alignment approach has facilitated rapid elec. characterization of 350- and 70-nm-diam. Au nanowires, which had room-temp. resistivities of approx. 2.9 and 4.5×10-6 Ω cm.
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8Li, M.; Bhiladvala, R. B.; Morrow, T. J.; Sioss, J. A.; Lew, K.-K.; Redwing, J. M.; Keating, C. D.; Mayer, T. S. Bottom-up Assembly of Large-Area Nanowire Resonator Arrays Nat. Nanotechnol. 2008, 3, 88– 92 DOI: 10.1038/nnano.2008.268https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BD1cXhs1aju7Y%253D&md5=86bf131b54af64d5be48fffa879b13a1Bottom-up assembly of large-area nanowire resonator arraysLi, Mingwei; Bhiladvala, Rustom B.; Morrow, Thomas J.; Sioss, James A.; Lew, Kok-Keong; Redwing, Joan M.; Keating, Christine D.; Mayer, Theresa S.Nature Nanotechnology (2008), 3 (2), 88-92CODEN: NNAABX; ISSN:1748-3387. (Nature Publishing Group)Directed-assembly of nanowire-based devices will enable the development of integrated circuits with new functions that extend well beyond mainstream digital logic. For example, nanoelectromech. resonators are very attractive for chip-based sensor arrays because of their potential for ultrasensitive mass detection. In this letter, we introduce a new bottom-up assembly method to fabricate large-area nanoelectromech. arrays each having over 2,000 single-nanowire resonators. The nanowires are synthesized and chem. functionalized before they are integrated onto a silicon chip at predetd. locations. Peptide nucleic acid probe mols. attached to the nanowires before assembly maintain their binding selectivity and recognize complementary oligonucleotide targets once the resonator array is assembled. The two types of cantilevered resonators we integrated here using silicon and rhodium nanowires had Q-factors of ∼4,500 and ∼1,150, resp., in vacuum. Taken together, these results show that bottom-up nanowire assembly can offer a practical alternative to top-down fabrication for sensitive chip-based detection.
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9Papadakis, S. J.; Hoffmann, J. A.; Deglau, D.; Chen, A.; Tyagi, P.; Gracias, D. H. Quantitative Analysis of Parallel Nanowire Array Assembly by Dielectrophoresis Nanoscale 2011, 3, 1059– 1065 DOI: 10.1039/C0NR00536CThere is no corresponding record for this reference.
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10Encyclopedia of Nanotechnology; Bhushan, B., Ed.; Springer: The Netherlands, 2012.There is no corresponding record for this reference.
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11Pohl, H. A. Dielectrophoresis; Cambridge University Press: Cambridge, U.K., 1978.There is no corresponding record for this reference.
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12House, D. L.; Luo, H.; Chang, S. Numerical Study on Dielectrophoretic Chaining of Two Ellipsoidal Particles J. Colloid Interface Sci. 2012, 374, 141– 149 DOI: 10.1016/j.jcis.2012.01.039There is no corresponding record for this reference.
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13Pethig, R. Review Article—Dielectrophoresis: Status of the Theory, Technology, and Applications Biomicrofluidics 2010, 4, 039901 DOI: 10.1063/1.3474458There is no corresponding record for this reference.
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14Freer, E. M.; Grachev, O.; Duan, X.; Martin, S.; Stumbo, D. P. High-Yield Self-Limiting Single-Nanowire Assembly with Dielectrophoresis Nat. Nanotechnol. 2010, 5, 525– 530 DOI: 10.1038/nnano.2010.10614https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BC3cXotl2mtbw%253D&md5=9594dc2016da8b706f489c9668afec99High-yield self-limiting single-nanowire assembly with dielectrophoresisFreer, Erik M.; Grachev, Oleg; Stumbo, David P.Nature Nanotechnology (2010), 5 (7), 525-530CODEN: NNAABX; ISSN:1748-3387. (Nature Publishing Group)Single-crystal nanowire transistors and other nanowire-based devices could have applications in large-area and flexible electronics if conventional top-down fabrication techniques can be integrated with high-precision bottom-up nanowire assembly. Here, the authors extend dielectrophoretic nanowire assembly to achieve a 98.5% yield of single nanowires assembled over 16,000 patterned electrode sites with submicrometre alignment precision. The balancing of surface, hydrodynamic and dielectrophoretic forces makes the self-assembly process controllable, and a hydrodynamic force component makes it self-limiting. The authors' approach represents a methodol. to quantify nanowire assembly, and makes single nanowire assembly possible over an area limited only by the ability to reproduce process conditions uniformly.
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15Velev, O. D.; Gangwal, S.; Petsev, D. N. Particle-Localized AC and DC Manipulation and Electrokinetics Annu. Rep. Prog. Chem., Sect. C: Phys. Chem. 2009, 105, 213– 246 DOI: 10.1039/b803015b15https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BD1MXlt1Snsro%253D&md5=62df030b656858b1f20e0e780a6fcaf8Particle-localized AC and DC manipulation and electrokineticsVelev, Orlin D.; Gangwal, Sumit; Petsev, Dimiter N.Annual Reports on the Progress of Chemistry, Section C: Physical Chemistry (2009), 105 (), 213-246CODEN: ACPCDW; ISSN:0260-1826. (Royal Society of Chemistry)A review. Colloidal particles suspended in water respond to direct (DC) or a.c. (AC) fields in a variety of ways, including directional motion along or across the field direction, field-gradient dependent response and induced particle-particle interaction. We review here some of these effects and their applications in new techniques for particle manipulation and assembly, making of novel biomaterials and designing of new self-propelling microdevices. The coupling of the counter ionic layer mobility, fluid flows and the resulting particle motion are the basis not only of the classic electrophoretic effects, but also of the recent developments in AC electrohydrodynamics and induced charge electrophoresis of asym. particles. We also discuss how dielectrophoresis (particle interaction with external AC field gradients), could be used to manipulate and assemble objects on any size scale. We discuss the interactions leading to the assembly of such structures, ways to simulate the dynamics of the process and the effect of particle size and cond. on the type of structure obtained. Finally, we demonstrate how an addnl. level of complexity can be engineered to turn miniature semiconductor diodes into prototypes of self-propelling micromachines and micropumps. The diodes suspended in water propel themselves electro-osmotically when a uniform alternating elec. field is applied across the container. Semiconductor diodes embedded in channel walls could serve as distributed microfluidic pumps and mixers powered by a global external field.
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16Velev, O. D.; Bhatt, K. H. On-Chip Micromanipulation and Assembly of Colloidal Particles by Electric Fields Soft Matter 2006, 2, 738 DOI: 10.1039/b605052b16https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BD28XpvVGgtL0%253D&md5=cac77bfe180af767e0cd4f9caf898154On-chip micromanipulation and assembly of colloidal particles by electric fieldsVelev, Orlin D.; Bhatt, Ketan H.Soft Matter (2006), 2 (9), 738-750CODEN: SMOABF; ISSN:1744-683X. (Royal Society of Chemistry)A review of the ways in which elec. fields can be used for on-chip manipulation and assembly of colloidal particles.
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17Rouhi, N.; Jain, D.; Burke, P. J. High-Performance Semiconducting Nanotube Inks: Progress and Prospects ACS Nano 2011, 5, 8471– 8487 DOI: 10.1021/nn201828y17https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BC3MXhtlWjt7rL&md5=3f01452e0e211fddd470bb7bb3869315High-Performance Semiconducting Nanotube Inks: Progress and ProspectsRouhi, Nima; Jain, Dheeraj; Burke, Peter JohnACS Nano (2011), 5 (11), 8471-8487CODEN: ANCAC3; ISSN:1936-0851. (American Chemical Society)A review. While the potential for high mobility printed semiconducting nanotube inks was clear for over a decade, a myriad of scientific and technol. issues has prevented commercialization and practical use. One of the most challenging scientific problems was to understand the relation between the pristine, individual nanotube mobility (known to be in the 10,000 cm2/V·s range) and the as-deposited random network mobility (recently demonstrated in the 100 cm2/V·s range). An addnl. significant scientific hurdle was to understand, manage, and ultimately eliminate the effects of metallic nanotubes on the network performance, specifically the on/off ratio. Addnl. scientific progress is important in understanding the dependence of nanotube length, diam., and d. on device performance. Finally, the development of ink formulations that are of practical use in manufg. is of paramount importance, esp. with regard to drying time and uniformity, and ultimately, the issue of scalability and cost must be addressed. Many of these issues have recently been studied from a phenomenol. point of view, and a comprehensive understanding is beginning to emerge. The authors present an overview of soln.-based printed carbon nanotube devices and discuss long-term technol. prospects. While significant tech. challenges still remain, the prospects for the use of nanotube ink in a myriad of systems is feasible given their unmatched mobility and compatibility with heterogeneous integration into a variety of applications in printed and flexible electronics.
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18Velev, O. D.; Gupta, S. Materials Fabricated by Micro- and Nanoparticle Assembly - The Challenging Path from Science to Engineering Adv. Mater. 2009, 21, 1897– 1905 DOI: 10.1002/adma.20080183718https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BD1MXmtVGqt7c%253D&md5=66815f3397db267b07cde9b333416effMaterials Fabricated by Micro- and Nanoparticle Assembly - The Challenging Path from Science to EngineeringVelev, Orlin D.; Gupta, ShaliniAdvanced Materials (Weinheim, Germany) (2009), 21 (19), 1897-1905CODEN: ADVMEW; ISSN:0935-9648. (Wiley-VCH Verlag GmbH & Co. KGaA)The strategies are classified for colloidal assembly and the diverse potential applications of micro- and nanoparticle structures in materials and device prototypes are discussed. The useful properties of the particle assemblies, such as high surface-to-vol. ratio, periodicity at mesoscale, large packing d., and long-range ordering, can be harnessed in optical, electronic, and biosensing devices. The present and future trends in the colloidal-assembly field are discussed, focusing on the challenges of developing fabrication procedures that are rapid and efficiently controlled. We speculate on how the issues of scalability, control, and precision can be addressed are speculated and how the functionality of the assemblies can be increased to better match the needs of technol.
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19Tesla, N. Apparatus for Transmitting Electrical Energy. U.S. Patent 1,119,732, Dec 1, 1914.There is no corresponding record for this reference.
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20Haddad, A.; Warne, D. Advances in High Voltage Engineering; The Institution of Engineering and Technology: London, U.K., 2007.There is no corresponding record for this reference.
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21Padmaraj, D.; Zagozdzon-Wosik, W.; Xie, L. M.; Hadilev, V. G.; Cherukuri, P.; Wosik, J. Parallel and Orthogonal E-Field Alignment of Single-Walled Carbon Nanotubes by AC Dielectrophoresis Nanotechnology 2009, 20, 035201 DOI: 10.1088/0957-4484/20/3/035201There is no corresponding record for this reference.
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22Farajian, A. A.; Pupysheva, O. V.; Schmidt, H. K.; Yakobson, B. I. Polarization, Energetics, and Electrorheology in Carbon Nanotube Suspensions Under an Applied Electric Field: An Exact Numerical Approach Phys. Rev. B: Condens. Matter Mater. Phys. 2008, 77, 205432 DOI: 10.1103/PhysRevB.77.205432There is no corresponding record for this reference.
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23Tsyboulski, D. A.; Bachilo, S. M.; Weisman, R. B. Versatile Visualization of Individual Single-Walled Carbon Nanotubes with Near-Infrared Fluorescence Microscopy Nano Lett. 2005, 5, 975– 979 DOI: 10.1021/nl050366f23https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BD2MXjt1SmtLk%253D&md5=104aad13d94576598c942c003a6dcbfbVersatile Visualization of Individual Single-Walled Carbon Nanotubes with Near-Infrared Fluorescence MicroscopyTsyboulski, Dmitri A.; Bachilo, Sergei M.; Weisman, R. BruceNano Letters (2005), 5 (5), 975-979CODEN: NALEFD; ISSN:1530-6984. (American Chemical Society)Fluorescence microscopy in the near-IR at 950-1600 nm was developed as a novel method to image and study single-walled C nanotubes (SWNTs) in a variety of environments. Intrinsic luminescence of disaggregated pristine SWNTs was excited by a diode laser and detected with a 2-dimensional InGaAs photodiode array. Individual nanotubes were visualized with a spatial resoln. of ∼1 μm and characterized with polarization measurements and emission spectroscopy. Spatially resolved emission spectra allowed (n,m) identification of single nanotubes and revealed small environmentally induced spectral shifts between segments of long tubes. Nanotube motions in aq. surfactant were visualized with a time resoln. of 50 ms and used to est. the diffusion coeff.
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24Balanis, C. Antenna Theory; John Wiley & Sons Inc: Hoboken, NJ, 2005.There is no corresponding record for this reference.
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25Hermanson, K. D.; Lumsdon, S. O.; Williams, J. P.; Kaler, E. W.; Velev, O. D. Dielectrophoretic Assembly of Electrically Functional Microwires from Nanoparticle Suspensions Science 2001, 294, 1082– 1086 DOI: 10.1126/science.106382125https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BD3MXot1Krsbk%253D&md5=e881d804ff34a65dc0226477ef2f33ceDielectrophoretic assembly of electrically functional microwires from nanoparticle suspensionsHermanson, Kevin O.; Lumsdon, Simon O.; Williams, Jacob P.; Kater, Eric W.; Velev, Orlin D.Science (Washington, DC, United States) (2001), 294 (5544), 1082-1086CODEN: SCIEAS; ISSN:0036-8075. (American Association for the Advancement of Science)A new class of microwires can be assembled by dielectrophoresis from suspensions of metallic nanoparticles. The wires are formed in the gaps between planar electrodes and can grow faster than 50 μm per s to lengths exceeding 5 mm. They have good ohmic conductance and automatically form elec. connections to conductive islands or particles. The thickness and the fractal dimension of the wires can be controlled, and composite wires with a metallic core surrounded by a latex shell can be assembled. The simple assembly process and their high surface-to-vol. ratio make these structures promising for wet electronic and bioelectronic circuits.
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26Corr, S.; Raoof, M.; Cisneros, B.; Orbaek, A.; Cheney, M.; Law, J.; Lara, N.; Barron, A.; Wilson, L.; Curley, S. Radiofrequency Electric-Field Heating Behaviors of Highly Enriched Semiconducting and Metallic Single-Walled Carbon Nanotubes Nano Res. 2015, 8, 2859– 2870 DOI: 10.1007/s12274-015-0791-126https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BC2MXht1eksr7J&md5=9d67b9f842488a850e4c419e25258f9dRadiofrequency electric-field heating behaviors of highly enriched semiconducting and metallic single-walled carbon nanotubesCorr, Stuart J.; Raoof, Mustafa; Cisneros, Brandon T.; Orbaek, Alvin W.; Cheney, Matthew A.; Law, Justin J.; Lara, Nadia C.; Barron, Andrew R.; Wilson, Lon J.; Curley, Steven A.Nano Research (2015), 8 (9), 2859-2870CODEN: NRAEB5; ISSN:1998-0000. (Springer GmbH)It is theorized that enhanced thermal heating may result from exposing single-walled carbon nanotubes (SWNTs) embedded in a conductive host to radiofrequency (RF) elec. fields. We examine the RF-induced (13.56 MHz) heating behaviors of 95% metallic- and semiconducting-enriched SWNTs (m-/s-SWNTs) suspended in aq. solns. with varying NaCl molarity (0.001 mM-1 M). The heating effects were only evident for host molarities below 1 mM (equiv. to 0.1 S/m) at which the s-SWNT heating rates dominated those of the m-SWNTs. The heating effects were localized to aligned and aggregated "SWNT ropes" ∼1 cm in length that formed in suspension, parallel to the elec.-field vector, during the RF exposure. For molarities above 1 mM, no enhancements were evident, owing to the large heating effects of the bulk ionic NaCl suspensions, which were obsd. in previous studies. Although larger enhancement effects proportional to the host cond. have been theor. predicted for m-/s-SWNT suspensions, this was not obsd. most likely because of the aggregation and screening effects, which diminished the scattered elec. field near the m-/s-SWNTs. Our research may further the development of better nanoparticle heating agents for applications such as non-invasive RF-induced cancer hyperthermia. [Figure not available: see fulltext.].
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27Arp, P. A.; Mason, S. G. Particle Behavior in Shear and Electric Fields. VIII. Interactions of Pairs of Conducting Spheres (theoretical) Colloid Polym. Sci. 1977, 255, 566– 584 DOI: 10.1007/BF01549744There is no corresponding record for this reference.
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28Arp, P. A.; Mason, S. G. Particle Behavior in Shear and Electric Fields. IX. Interactions of Pairs of Conducting Spheres (experimental) Colloid Polym. Sci. 1977, 255, 980– 993 DOI: 10.1007/BF0177620528https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADyaE1cXnsFyktA%253D%253D&md5=6f7c707fa21e618b15e4c6210515a151Particle behavior in shear and electric fields. IX. Interactions of pairs of conducting spheres (experimental)Arp, P. A.; Mason, S. G.Colloid and Polymer Science (1977), 255 (10), 980-93CODEN: CPMSB6; ISSN:0303-402X.Obsns. of the pair interactions of rigid, conducting spheres suspended in a Newtonian dielec. fluid are described for expts. in which the fluid was subjected to combined simple shear of rate G and uniform elec. fields of strength E0 where behavior is predicted to depend on a parameter f proportional to E02/G. Agreement with theory was excellent for touching spheres which oriented themselves with calculable rates in E0 alone and rotated with calculable periods of rotation in subcrit. fields (f <1); in supercrit. fields (f ≥1) the doublets assumed their stable predicted orientations. The trajectories of sepd. spheres were in good agreement with theory, with capture obsd. as predicted, provided an exptl. detd. min. value, fmin, was exceeded, whose value appeared to depend on the surface roughness of the spheres and on their behavior during dielec. breakdown of the medium when the spheres were close together. After capture the spheres appeared to make phys. contact. The capture cross sections were measured and agreed with the theor. values except below fmin. The significance of the phenomena and the possibilities of employing them for measuring phys. properties of dielec. liqs. are discussed.
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29Tesla, N. The Transmission of Electrical Energy without Wires Electr. World Eng. 1904, XLIII (March 5) 429– 431There is no corresponding record for this reference.
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30Pokorny, P.; Kostakova, E.; Sanetrnik, F.; Mikes, P.; Chvojka, J.; Kalous, T.; Bilek, M.; Pejchar, K.; Valtera, J.; Lukas, D. Effective AC Needleless and Collectorless Electrospinning for Yarn Production Phys. Chem. Chem. Phys. 2014, 16, 26816– 26822 DOI: 10.1039/C4CP04346D30https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BC2cXhslOisL3I&md5=e294fe62eb8f60aa7dff18129fa1be77Effective AC needleless and collectorless electrospinning for yarn productionPokorny, P.; Kostakova, E.; Sanetrnik, F.; Mikes, P.; Chvojka, J.; Kalous, T.; Bilek, M.; Pejchar, K.; Valtera, J.; Lukas, D.Physical Chemistry Chemical Physics (2014), 16 (48), 26816-26822CODEN: PPCPFQ; ISSN:1463-9076. (Royal Society of Chemistry)Nanofibrous materials are essential components for a wide range of applications, particularly in the fields of medicine and material engineering. These include protective materials, sensors, cosmetics, hygiene, filtration and energy storage. The most widely used and researched technol. in these fields is electrospinning. This method for producing fibers yields highly promising results thanks to its versatility and simplicity. Electrospinning is employed in multiple forms, among which needle and needleless d.c. (DC) variants are the most distinctive. The former is based on the generation of just one single jet from a nozzle; hence this fabrication process is not very productive. The latter uses the destabilization of free liq. surfaces by means of an elec. field, which enhances the throughput since it produces numerous jets, emitted from the surfaces of rollers, spheres, strings and spirals. However, although some progress in total producibility has been achieved, the efficiency of the DC method still remains relatively low. A further drawback of DC electrospinning is that both variants need a collector, which makes it difficult to combine DC electrospinning easily with other technologies due to the presence of the high field strength within the entire spinning zone. This paper describes our expts. with AC electrospinning. We show that a.c. (AC) electrospinning based on a needleless spinning-electrode provides a highly productive smoke-like aerogel composed of nanofibers. This aerogel rises rapidly from the electrode like a thin plume of smoke, without any need for a collector. Our work shows that AC needleless electrospinning gains its efficiency and collector-less feature thanks to the creation of a perpetually charge-changing virtual counter-electrode composed of the nanofibers emitted. High-speed camera recordings demonstrate the formation mechanism of the nanofibrous plume, which is wafted by an elec. wind. This wind's velocity field is exptl. investigated. One potential use of AC needleless electrospinning is demonstrated here by spinning it into a yarn.
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31Vijayaraghavan, A. A. Bottom-Up Assembly of Nano-Carbon Devices by Dielectrophoresis Phys. Status Solidi B 2013, 250, 2505– 2517 DOI: 10.1002/pssb.201300565There is no corresponding record for this reference.
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32Cherukuri, P.; Gannon, C. J.; Leeuw, T. K.; Schmidt, H. K.; Smalley, R. E.; Curley, S. A.; Weisman, R. B. Mammalian Pharmacokinetics of Carbon Nanotubes Using Intrinsic Near-Infrared Fluorescence Proc. Natl. Acad. Sci. U. S. A. 2006, 103, 18882– 18886 DOI: 10.1073/pnas.060926510332https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BD28XhtlChurfK&md5=fe8c7343fbc326ee0d2d7c161fff1ac8Mammalian pharmacokinetics of carbon nanotubes using intrinsic near-infrared fluorescenceCherukuri, Paul; Gannon, Christopher J.; Leeuw, Tonya K.; Schmidt, Howard K.; Smalley, Richard E.; Curley, Steven A.; Weisman, R. BruceProceedings of the National Academy of Sciences of the United States of America (2006), 103 (50), 18882-18886CODEN: PNASA6; ISSN:0027-8424. (National Academy of Sciences)Individualized, chem. pristine single-walled carbon nanotubes were i.v. administered to rabbits and monitored through their characteristic near-IR fluorescence. Spectra indicated that blood proteins displaced the nanotube coating of synthetic surfactant mols. within seconds. The nanotube concn. in the blood serum decreased exponentially with a half-life of 1.0 ± 0.1 h. No adverse effects from low-level nanotube exposure could be detected from behavior or pathol. examn. At 24 h after i.v. administration, significant concns. of nanotubes were found only in the liver. These results demonstrate that debundled single-walled carbon nanotubes are high-contrast near-IR fluorophores that can be sensitively and selectively tracked in mammalian tissues using optical methods. In addn., the absence of acute toxicity and promising circulation persistence suggest the potential of carbon nanotubes in future pharmaceutical applications.
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33Loeb, L. B. Electrical Coronas: Their Basic Physical Mechanism; University of California Press: Berkeley, CA, 1965.There is no corresponding record for this reference.
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34Smith, B. D.; Mayer, T. S.; Keating, C. D. Deterministic Assembly of Functional Nanostructures Using Nonuniform Electric Fields Annu. Rev. Phys. Chem. 2012, 63, 241– 263 DOI: 10.1146/annurev-physchem-032210-10334634https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BC38Xnt1Glu74%253D&md5=71eca2a270ad3523807141fa85437aebDeterministic assembly of functional nanostructures using nonuniform electric fieldsSmith, Benjamin D.; Mayer, Theresa S.; Keating, Christine D.Annual Review of Physical Chemistry (2012), 63 (), 241-263CODEN: ARPLAP; ISSN:0066-426X. (Annual Reviews Inc.)A review. The force induced on anisotropic nanoparticles in a nonuniform elec. field can be used to attract, orient, and position the nanoparticles with respect to microelectrodes on a surface. For polarizable nanomaterials, such as nanowires, carbon nanotubes, or graphene sheets suspended in solvent, this dielectrophoretic force results in movement to regions of highest elec. field strength. This review discusses the origin of this force, its prodn. by different microelectrode designs, and its use for nanomaterials assembly, with a focus on efforts toward heterogeneous integration with on-chip electronics for single-particle characterization and device structures.
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35Jefimenko, O. Demonstration of the Electric Fields of Current-Carrying Conductors Am. J. Phys. 1962, 30, 19– 21 DOI: 10.1119/1.1941887There is no corresponding record for this reference.
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36Leeuw, T. K.; Tsyboulski, D. A.; Nikolaev, P. N.; Bachilo, S. M.; Arepalli, S.; Weisman, R. B. Strain Measurements on Individual Single-Walled Carbon Nanotubes in a Polymer Host: Structure-Dependent Spectral Shifts and Load Transfer Nano Lett. 2008, 8, 826– 831 DOI: 10.1021/nl072861c36https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BD1cXisVWlu7g%253D&md5=8bb2e1ee6ac89a92993f1b7cfb454f6aStrain Measurements on Individual Single-Walled Carbon Nanotubes in a Polymer Host: Structure-Dependent Spectral Shifts and Load TransferLeeuw, Tonya K.; Tsyboulski, Dmitri A.; Nikolaev, Pavel N.; Bachilo, Sergei M.; Arepalli, Sivaram; Weisman, R. BruceNano Letters (2008), 8 (3), 826-831CODEN: NALEFD; ISSN:1530-6984. (American Chemical Society)The fluorescence of individual semiconducting single-walled C nanotubes embedded in polymer films was measured during the application of controlled stretching and compressive strains. Nanotube band gaps shift in systematic patterns that depend on the (n,m) structural type and are in agreement with the predictions of theor. models. Loss of nanotube-host adhesion was revealed by abrupt irregularities in plots of spectral shift vs. strain.
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For example: glass beads, polystyrene, carbon black, gold, graphite, wax, silica beads.
There is no corresponding record for this reference. -
38Blatt, S.; Hennrich, F.; Lohneysen, H.; Kappes, M. M.; Vijayaraghavan, A.; Krupke, R. Influence of Structural and Dielectric Anisotropy on the Dielectrophoresis of Single-Walled Carbon Nanotubes Nano Lett. 2007, 7, 1960– 1966 DOI: 10.1021/nl0706751There is no corresponding record for this reference.
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39Sarker, B. K.; Shekhar, S.; Khondaker, S. I. Semiconducting Enriched Carbon Nanotube Aligned Arrays of Tunable Density and Their Electrical Transport Properties ACS Nano 2011, 5, 6297– 6305 DOI: 10.1021/nn201314t39https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BC3MXovFKlsLg%253D&md5=b15fb544a33be7ed8b20ce296ec98ea3Semiconducting Enriched Carbon Nanotube Aligned Arrays of Tunable Density and Their Electrical Transport PropertiesSarker, Biddut K.; Shekhar, Shashank; Khondaker, Saiful I.ACS Nano (2011), 5 (8), 6297-6305CODEN: ANCAC3; ISSN:1936-0851. (American Chemical Society)The authors demonstrate assembly of soln.-processed semiconducting enriched (99%) single-walled carbon nanotubes (s-SWNTs) in an array with varying linear d. via a.c. dielectrophoresis (DEP) and study detailed electronic transport properties of the fabricated devices. (i) the quality of the alignment varies with frequency of the applied voltage and (ii) by varying the frequency and concn. of the soln., the authors can control the linear d. of the s-SWNTs in the array from 1/μm to 25/μm. The DEP assembled s-SWNT devices provide the opportunity to study the transport property of the arrays in the direct transport regime. Room temp. electron transport measurements of the fabricated devices show that with increasing nanotube d. the device mobility increases while the current on-off ratio decreases dramatically. For the dense array, the device c.d. was 16 μA/μm, on-conductance was 390 μS, and sheet resistance was 30 kΩ/.box.. These values are the best reported so far for any semiconducting nanotube array.
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40Brothers, E. N.; Scuseria, G. E.; Kudin, K. N. Longitudinal Polarizability of Carbon Nanotubes J. Phys. Chem. B 2006, 110, 12860– 12864 DOI: 10.1021/jp0603839There is no corresponding record for this reference.
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41Dierking, I.; Scalia, G.; Morales, P. Liquid Crystal-Carbon Nanotube Dispersions J. Appl. Phys. 2005, 97, 044309 DOI: 10.1063/1.185060641https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BD2MXhtlWksb8%253D&md5=837ad9d43a4b4a479517b2f6a73baf49Liquid crystal-carbon nanotube dispersionsDierking, I.; Scalia, G.; Morales, P.Journal of Applied Physics (2005), 97 (4), 044309/1-044309/5CODEN: JAPIAU; ISSN:0021-8979. (American Institute of Physics)Parallel alignment of nanotubes can be obtained by dispersion in a self-organizing anisotropic fluid such as a nematic liq. crystal. Exploiting the cooperative reorientation of liq. crystals, the overall direction of the nanotube alignment can be controlled both statically and dynamically by the application of external fields. These can be elec., magnetic, mechanic, or even optic in nature. Employing multiwall as well as single-wall C nanotubes, we show their parallel alignment along a uniform liq. crystal director field and elec. verify their reorientation behavior for two complementary geometries. These demonstrate elec. controlled C nanotube OFF-ON and ON-OFF switches. Further application potential will be outlined.
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42Hong, S.; Banks, T.; Rogers, J. Improved Density in Aligned Arrays of Single-Walled Carbon Nanotubes by Sequential Chemical Vapor Deposition on Quartz Adv. Mater. 2010, 22, 1826– 1830 DOI: 10.1002/adma.20090323842https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BC3cXlt1GgurY%253D&md5=e4f3484ebe06d29cf1ce08a1dde556edImproved Density in Aligned Arrays of Single-Walled Carbon Nanotubes by Sequential Chemical Vapor Deposition on QuartzHong, Suck Won; Banks, Tony; Rogers, John A.Advanced Materials (Weinheim, Germany) (2010), 22 (16), 1826-1830CODEN: ADVMEW; ISSN:0935-9648. (Wiley-VCH Verlag GmbH & Co. KGaA)A process of forming densely aligned single walled carbon nanotubes (SWNT) using sequential chem. vapor deposition is discussed. This process uses a lithog. pattern of catalytic iron oxide followed by CVD. The process is continued selective removal of SWNT from the areas adjacent to the iron oxide followed by a subsequent CVD for deposition of more SWNT. This process can be used for the formation of electronic components such as the demonstrated transistors made out of SWNT arrays.
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43Shulaker, M. M.; Hills, G.; Patil, N.; Wei, H.; Chen, H.-Y.; Wong, H.-S. P.; Mitra, S. Carbon Nanotube Computer Nature 2013, 501, 526– 530 DOI: 10.1038/nature1250243https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BC3sXhsFWms7jO&md5=20d497c54ec66c9c265b214aa4c6eccdCarbon nanotube computerShulaker, Max M.; Hills, Gage; Patil, Nishant; Wei, Hai; Chen, Hong-Yu; Wong, H.-S. Philip; Mitra, SubhasishNature (London, United Kingdom) (2013), 501 (7468), 526-530CODEN: NATUAS; ISSN:0028-0836. (Nature Publishing Group)A review. The miniaturization of electronic devices has been the principal driving force behind the semiconductor industry, and has brought about major improvements in computational power and energy efficiency. Although advances with silicon-based electronics continue to be made, alternative technologies are being explored. Digital circuits based on transistors fabricated from carbon nanotubes (CNTs) have the potential to outperform silicon by improving the energy-delay product, a metric of energy efficiency, by more than an order of magnitude. Hence, CNTs are an exciting complement to existing semiconductor technologies. Owing to substantial fundamental imperfections inherent in CNTs, however, only very basic circuit blocks have been demonstrated. Here we show how these imperfections can be overcome, and demonstrate the first computer built entirely using CNT-based transistors. The CNT computer runs an operating system that is capable of multitasking: as a demonstration, we perform counting and integer-sorting simultaneously. In addn., we implement 20 different instructions from the com. MIPS instruction set to demonstrate the generality of our CNT computer. This exptl. demonstration is the most complex carbon-based electronic system yet realized. It is a considerable advance because CNTs are prominent among a variety of emerging technologies that are being considered for the next generation of highly energy-efficient electronic systems.
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44Behabtu, N.; Young, C. C.; Tsentalovich, D. E.; Kleinerman, O.; Wang, X.; Ma, A. W. K.; Bengio, E. A.; ter Waarbeek, R. F.; de Jong, J. J.; Hoogerwerf, R. E.; Fairchild, S. B.; Ferguson, J. B.; Maruyama, B.; Kono, J.; Talmon, Y.; Cohen, Y.; Otto, M. J.; Pasquali, M. Strong, Light, Multifunctional Fibers of Carbon Nanotubes with Ultrahigh Conductivity Science 2013, 339, 182– 186 DOI: 10.1126/science.122806144https://chemport.cas.org/services/resolver?origin=ACS&resolution=options&coi=1%3ACAS%3A528%3ADC%252BC3sXjvVCgtg%253D%253D&md5=4d1c97f302cd69f4f5d23d8aff7b67fbStrong, Light, Multifunctional Fibers of Carbon Nanotubes with Ultrahigh ConductivityBehabtu, Natnael; Young, Colin C.; Tsentalovich, Dmitri E.; Kleinerman, Olga; Wang, Xuan; Ma, Anson W. K.; Bengio, E. Amram; ter Waarbeek, Ron F.; de Jong, Jorrit J.; Hoogerwerf, Ron E.; Fairchild, Steven B.; Ferguson, John B.; Maruyama, Benji; Kono, Junichiro; Talmon, Yeshayahu; Cohen, Yachin; Otto, Marcin J.; Pasquali, MatteoScience (Washington, DC, United States) (2013), 339 (6116), 182-186CODEN: SCIEAS; ISSN:0036-8075. (American Association for the Advancement of Science)Broader applications of carbon nanotubes to real-world problems have largely gone unfulfilled because of difficult material synthesis and laborious processing. We report high-performance multifunctional carbon nanotube (CNT) fibers that combine the specific strength, stiffness, and thermal cond. of carbon fibers with the specific elec. cond. of metals. These fibers consist of bulk-grown CNTs and are produced by high-throughput wet spinning, the same process used to produce high-performance industrial fibers. These scalable CNT fibers are positioned for high-value applications, such as aerospace electronics and field emission, and can evolve into engineered materials with broad long-term impact, from consumer electronics to long-range power transmission.
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45Cademartiri, L.; Bishop, K. J. M. Programmable Self-Assembly Nat. Mater. 2014, 14, 2– 9 DOI: 10.1038/nmat4184There is no corresponding record for this reference.
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