KMS Chongqing Institute of Green and Intelligent Technology, CAS
Development of silver/gold nanocages onto indium tin oxide glass as a reagentless plasmonic mercury sensor | |
Huang, Daodan1; Hu, Tingting1; Chen, Na1; Zhang, Wei2; Di, Junwei1 | |
2014-05-12 | |
摘要 | 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 similar to 800 nm. By utilizing the redox reaction between Hg2+ 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 Hg2+ ions. The LSPR peak changes were lineally proportional to the concentration of Hg2+ ions over the range from 10 ppb to 0.5 ppm. The detection limit was similar to 5 ppb. This plasmonic probe shows good selectivity and high sensitivity. The proposed optical probe is successfully applied to the sensing of Hg2+ in real samples. (C) 2014 Elsevier B. V. All rights reserved. |
关键词 | Localized Surface Plasmon Resonance Mercury Optical Sensor Silver/gold Nanocage |
DOI | 10.1016/j.aca.2014.03.037 |
发表期刊 | ANALYTICA CHIMICA ACTA |
ISSN | 0003-2670 |
卷号 | 825页码:51-56 |
收录类别 | SCI |
WOS记录号 | WOS:000335442700005 |
语种 | 英语 |