标题:A colorimetric and surface-enhanced Raman scattering dual-signal sensor for Hg2+ based on Bismuthiol II-capped gold nanoparticles
作者:Duan, Junling ;Yang, Min ;Lai, Yongchao ;Yuan, Jingpeng ;Zhan, Jinhua
作者机构:[Duan, Junling ;Yang, Min ;Lai, Yongchao ;Yuan, Jingpeng ;Zhan, Jinhua ] Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Dep 更多
通讯作者:Zhan, J
来源:Analytica Chimica Acta
出版年:2012
卷:723
页码:88-93
DOI:10.1016/j.aca.2012.02.031
摘要:The addition of Bismuthiol II to the gold nanoparticles (AuNPs) solution led to the aggregation of AuNPs with a color change from red to blue. As a result, hot spots were formed and strong surface-enhanced Raman scattering (SERS) signal of Bismuthiol II was observed. However, the Bismuthiol II-induced aggregation of AuNPs could be reversed by Hg2+ in the system, accompanied by a remarkable color change from blue to red. As evidenced by UV-vis and SERS spectroscopy, the variation in absorption band and SERS intensity was strongly dependent on the concentration of Hg2+, suggesting a colorimetric and SERS dual-signal sensor for Hg2+. The sensor had a high sensitivity, low detection limits of 2nM and 30nM could be achieved by UV-vis spectroscopy and by SERS spectroscopy, respectively. Other environmentally relevant metal ions did not interfere with the detection of Hg2+. The method was successfully applied to detect Hg2+ in water samples. It was simple, rapid and cost-effective without any modifying or labeling procedure. © 2012 Elsevier B.V..
收录类别:EI
资源类型:期刊论文
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