Hydrogen-Induced Aggregation of Au@Pd Nanoparticles for Eye-Readable Plasmonic Hydrogen Sensors
- Chao Li
Chao LiCollege of Sciences, Northeastern University, Shenyang 110189, People’s Republic of ChinaMore by Chao Li
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- Huili Zhu
Huili ZhuCollege of Sciences, Northeastern University, Shenyang 110189, People’s Republic of ChinaMore by Huili Zhu
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- Yu Guo
Yu GuoCollege of Sciences, Northeastern University, Shenyang 110189, People’s Republic of ChinaMore by Yu Guo
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- Shunsheng Ye
Shunsheng YeState Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, People’s Republic of ChinaMore by Shunsheng Ye
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- Tieqiang Wang
Tieqiang WangCollege of Sciences, Northeastern University, Shenyang 110189, People’s Republic of ChinaMore by Tieqiang Wang
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- Yu Fu
Yu FuCollege of Sciences, Northeastern University, Shenyang 110189, People’s Republic of ChinaMore by Yu Fu
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- Xuemin Zhang*
Xuemin Zhang*Email: [email protected]College of Sciences, Northeastern University, Shenyang 110189, People’s Republic of ChinaMore by Xuemin Zhang
Abstract
Plasmonic materials provide a promising platform for optical hydrogen detection, but their sensitivities remain limited. Herein, a new type of eye-readable H2 sensor based on Au@Pd core–shell nanoparticle arrays (NAs) is reported. After exposed to 2% H2, Au@Pd (16/2) NAs demonstrate a dramatic decrease in the optical extinction intensity, along with an obvious color change from turquoise to gray. Experimental results and theoretical calculations prove that the huge optical change resulted from the H2-induced aggregation of Au@Pd nanoparticles (NPs), which remarkably alters the plasmon coupling effect between NPs. Moreover, we optimize the sensing behavior from two aspects. The first is selecting appropriate substrates (either rigid glass substrate or flexible polyethylene terephthalate substrate) to offer moderate adhesion force to NAs, ensuring an efficient aggregation of Au@Pd NPs upon H2 exposure. The second is adjusting the Pd shell thickness to control the extent of NP aggregation and thus the detection range of the as-prepared sensors. This work highlights the advantage of designing eye-readable plasmonic H2 sensors from the aspect of tuning the interparticle plasmonic coupling in NP assemblies. Au@Pd NAs presented here have several advantages in terms of simple fabrication method, eye-readability in air background at room temperature, tunable detection range, and high cost-effectiveness.
Cited By
This article is cited by 1 publications.
- Kailun Zhang, Jakob Reichstein, Philipp Groppe, Simon Schoetz, Nina Stockinger, Jörg Libuda, Karl Mandel, Susanne Wintzheimer, Tanja Retzer. Molecular and Structural Insights into H2 Indicator Supraparticles: Lowering the Limit of Detection by Tuning Incorporated Catalyst Nanoparticles. Chemistry of Materials 2023, 35 (17) , 6808-6822. https://doi.org/10.1021/acs.chemmater.3c01105