生物传感器
催化作用
葡萄糖氧化酶
辣根过氧化物酶
纳米技术
生物分子
铂金
材料科学
铂纳米粒子
化学工程
分析物
组合化学
化学
有机化学
酶
物理化学
工程类
作者
Ruijin Zeng,Weijun Wang,Guoneng Cai,Zhenliang Huang,Jiangming Tao,Dianping Tang,Chengzhou Zhu
出处
期刊:Nano Energy
[Elsevier]
日期:2020-05-16
卷期号:74: 104931-104931
被引量:120
标识
DOI:10.1016/j.nanoen.2020.104931
摘要
Single-atom catalysts (SACs), a newcomer in the field of nanocatalysis, have sparked tremendous interest thanks to their high atomic utilization, unsaturated coordination environment, and attractive properties. Unfavorably, few studies have focused on the applications of the SACs in the biosensors. Herein, a reliable SiO2-templated strategy was elaborately designed to synthesize single-atom platinum anchored on the surface of hollow cadmium sulfide (HCdS–Pt1). Experimental results and density functional theory (DFT) calculation showed that the introduction of Pt1 was helpful for carrier separation and allowed high carrier density. As a proof-of-concept, HCdS–Pt1 was served as a photoelectrochemical sensing platform to detect biomolecules. To construct such a universal single-atom biosensor, horseradish peroxidase (HRP) and glucose oxidase (GOx) were encapsulated into DNA flowers (HRP&GOx-DF) with the high biorecognition capability. The as-prepared HRP &GOx-DFs could not only improve the thermal stability of the enzyme but also serve as the versatile recognition elements. In our design, HRP&GOx-DFs, enriched by target analyte, would bioetch HCdS–Pt1 irreversibly, thus resulting in the change of the electrical readout. Expectedly, SACs, combined with DNA nanotechnology, opens new opportunities for protein diagnostics and biosecurity.
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