Enhanced electrochemiluminescence of gold nanoclusters via silver doping and their application for ultrasensitive detection of dopamine.

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ID: 60685
2019
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Abstract
Gold nanoclusters (Au NCs) are a type of emerging ECL emitter with molecule-like properties and low toxicity that hold great potential for sensing application. However, the application of Au NCs in ECL sensing is still limited due to their low ECL efficiency. In this work, we provided an effective way to enhance the ECL efficiency of Au NCs. By doping Ag on GSH-protected Au NCs to form bimetallic clusters (GSH-Ag/Au NCs), the ECL efficiency of Au NCs was greatly improved. Based on the enhanced ECL signal of Au NCs, an ultrasensitive ECL sensor was constructed for the detection of dopamine (DA). DA exhibited a prominent ECL quenching effect towards the formed bimetallic GSH-Ag/Au NCs which can be used for DA detection. The proposed ECL sensor exhibited excellent sensitivity, selectivity and stability and had a wide linear range from 10 nM to 1 mM with a low detection limit of 2.3 nM (S/N = 3). More importantly, this work provided a potential method to improve the ECL properties of Au NCs and widen their analytical application.
Reference Key
tang2019enhancedthe Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Tang, Yao;Xu, Juntao;Xiong, Chengyi;Xiao, Yan;Zhang, Xiuhua;Wang, Shengfu;
Journal The Analyst
Year 2019
DOI
10.1039/c9an00032a
URL
Keywords
heterojunction agi cubi2o4 photocathodic sensing photoelectrochemical sensing

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