在氧化铟锡玻璃上制备银/金纳米笼作为无试剂等离子体汞传感器。
Development of silver/gold nanocages onto indium tin oxide glass as a reagentless plasmonic mercury sensor.
作者信息
Huang Daodan, Hu Tingting, Chen Na, Zhang Wei, Di Junwei
机构信息
The Key Lab of Health Chemistry and Molecular Diagnosis of Suzhou, College of Chemistry, Chemical Engineering and Material Science, Soochow University, Suzhou 215123, PR China.
Key Laboratory of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, PR China.
出版信息
Anal Chim Acta. 2014 May 12;825:51-6. doi: 10.1016/j.aca.2014.03.037. Epub 2014 Mar 29.
We demonstrate the utilization of silver/gold nanocages (Ag/Au NCs) deposited onto transparent indium tin oxide (ITO) film glass as the basis of a reagentless, simple and inexpensive mercury probe. The localized surface plasmon resonance (LSPR) peak wavelength was located at ∼800 nm. By utilizing the redox reaction between Hg(2+) ions and Ag atoms that existed in Ag/Au NCs, the LSPR peak of Ag/Au NCs was blue-shifted. Thus, we develop an optical sensing probe for the detection of Hg(2+) ions. The LSPR peak changes were lineally proportional to the concentration of Hg(2+) ions over the range from 10 ppb to 0.5 ppm. The detection limit was ∼5 ppb. This plasmonic probe shows good selectivity and high sensitivity. The proposed optical probe is successfully applied to the sensing of Hg(2+) in real samples.
我们展示了将沉积在透明铟锡氧化物（ITO）薄膜玻璃上的银/金纳米笼（Ag/Au NCs）用作无试剂、简单且廉价的汞探针的基础。局域表面等离子体共振（LSPR）峰波长位于约800 nm处。通过利用Hg(2+)离子与Ag/Au NCs中存在的Ag原子之间的氧化还原反应，Ag/Au NCs的LSPR峰发生蓝移。因此，我们开发了一种用于检测Hg(2+)离子的光学传感探针。在10 ppb至0.5 ppm的范围内，LSPR峰的变化与Hg(2+)离子的浓度呈线性比例关系。检测限约为5 ppb。这种等离子体探针显示出良好的选择性和高灵敏度。所提出的光学探针已成功应用于实际样品中Hg(2+)的传感检测。
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