Tannic acid capped gold nanoparticles: capping agent chemistry controls the redox activity.
Tannic acid capped gold nanoparticles: capping agent chemistry controls the redox activity.
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DOI：
10.1039/c9cp00056a
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发表时间：
2019-02
期刊：
影响因子：
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通讯作者：
A. Suherman;G. Zampardi;Hatem M. A. Amin;N. Young;R. Compton
中科院分区：
文献类型：
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作者：
A. Suherman;G. Zampardi;Hatem M. A. Amin;N. Young;R. Compton
我们报告的关键作用的封盖剂在检测金属阳离子使用单宁酸（TA）盖金纳米粒子在这两个合奏（使用循环伏安法）和单个粒子（使用氧化和还原nanoimpacts）。结果表明，在两种情况下，封端剂与Zn ~（2+）和Hg ~（2+）以可逆和朗缪尔方式络合。检测的灵敏度由纳米颗粒上存在的封端剂的量确定，对于氧化和还原反应两者具有相似的值。因此，封端剂负载的优化是金属离子检测的关键。
We report the key role of the capping agent in the detection of metal cations using tannic acid (TA) capped gold nanoparticles at both ensembles (using cyclic voltammetry) and with individual particles (using oxidative and reductive nanoimpacts). The results show that the capping agent complexes with Zn2+ and Hg2+ in a reversible and Langmuirian manner in both cases. The sensitivity of detection is determined by the amount of capping agent present on the nanoparticles with similar values seen for both oxidation and reduction reactions. The optimisation of the capping agent loading is therefore key to metal ion detection.