Target-induced nanocatalyst deactivation facilitated by core@shell nanostructures for signal-amplified headspace-colorimetric assay of dissolved hydrogen sulfide

Analytical Chemistry
Zhuangqiang GaoDietmar Knopp

Abstract

Colorimetric assay platforms for dissolved hydrogen sulfide (H2S) have been developed for more than 100 years, but most still suffer from relatively low sensitivity. One promising route out of this predicament relies on the design of efficient signal amplification methods. Herein, we rationally designed an unprecedented H2S-induced deactivation of (gold core)@(ultrathin platinum shell) nanocatalysts (Au@TPt-NCs) as a highly efficient signal amplification method for ultrasensitive headspace-colorimetric assay of dissolved H2S. Upon target introduction, Au@TPt-NCs were deactivated to different degrees dependent on H2S levels, and the degrees could be indicated by using a Au@TPt-NCs-triggered catalytic system as a signal amplifier, thus paving a way for H2S sensing. The combination of experimental studies and density functional theory (DFT) studies revealed that the Au@TPt-NCs with only 2-monolayer equivalents of Pt (θPt = 2) were superior for H2S-induced nanocatalyst deactivation owing to their enhanced peroxidase-like catalytic activity and deactivation efficiency stemmed from the unique synergistic structural/electronic effects between Au nanocores and ultrathin Pt nanoshells. Importantly, our analytical results showed that the...Continue Reading

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Citations

Jan 9, 2016·Analytical Chemistry·Samuel M RosolinaZi-Ling Xue
Mar 18, 2017·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Yuan-Feng WangChi-Fang Peng
Jun 24, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Zezhou YangXiaofeng Lu
Nov 26, 2019·Advanced Science·Weiyu ChenWeibo Cai
Jul 17, 2020·Analytical Methods : Advancing Methods and Applications·Xinyue RaoZhongde Liu
Mar 3, 2020·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Ze WangQiang Fei
Dec 29, 2020·Biotechnology and Applied Biochemistry·Weirong WeiLingling Wang
Feb 13, 2021·Analytical Methods : Advancing Methods and Applications·Yuqi ZhaoYanfu Huan
Nov 19, 2020·Journal of Analytical Methods in Chemistry·Congcong YinMin Wang
Jul 11, 2021·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Xiao-Lan ZhaoYun-Hui Yang
Aug 30, 2021·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Yahui SunLiangliang Zhao

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