合金
电化学
化学
纳米颗粒
纳米技术
纳米结构
制作
检出限
化学工程
电极
材料科学
有机化学
物理化学
色谱法
病理
工程类
医学
替代医学
作者
Wangwang Zheng,Jie Yao,Yuan Zhao
出处
期刊:Analytical Chemistry
[American Chemical Society]
日期:2021-09-15
卷期号:93 (38): 13080-13088
被引量:17
标识
DOI:10.1021/acs.analchem.1c03182
摘要
Electrochemical nanotags with controllable and multiresponse electroactivity have a great capacity for overcoming the drawbacks of limited target monitoring and inaccurate detection results for electrochemical sensors. In this contribution, double electro-oxidative Ru and Cu metals were integrated into RuCu nanostructures for the generation of dual electro-oxidative signals. A facial approach was proposed for the controllable fabrication of RuCu cage nanoparticles (NPs) and RuCu alloy NPs by simply adjusting the pH value of the reaction system. RuCu cage NPs and RuCu alloy NPs demonstrated inherent different electro-oxidative responses owing to the remarkable distinction of structures with different metal valences. RuCu cage NPs showed a single electro-oxidization peak at 0.84 V, assigned to the exposure of more Ru0 electroactive sites on the hollow cage structures. RuCu alloy NPs illustrated dual electro-oxidization peak at 0.84 and −0.16 V, attributing to the presence of Ru0 and Cu+ electroactive sites on the alloy structures, respectively. RuCu cage NPs and RuCu alloy NPs served as specific electroactive tags, achieving the selective monitoring of Na2S and ratiometric electrochemical detection of xanthine in monosodium glutamate, respectively. The limits of detection were as low as 27 pM for Na2S and 70 nM for xanthine. The rational design of multimetal nanostructures holds enormous potential for the generation of multiresponse electroactivity with the impetus for exploring the capacity of specific electrochemical sensing.
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