期刊
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
卷 12, 期 4, 页码 3006-3010出版社
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2012.5831
关键词
Mercuric Ion; Riboflavin; Gold Nanoparticle; Tris
类别
资金
- Chongqing Natural Science Foundation (CSTC) [2007BB0049]
- National Natural Science Foundation Committee of China
Gold nanoparticles (AuNPs) can be stabilized by riboflavin against tris buffer-induced aggregation. However, in the presence of mercury (II) (Hg2+), riboflavin can be released from the AuNPs surface and the riboflavin-Hg2+ complex formed, leading to the aggregation of AuNPs in tris buffer. The aggregation extent depends on the concentration of Hg2+. Based on the aggregation extent, a simple and sensitive method of determining Hg2+ is developed. The method enables the detection of Hg2+ over the concentration range of 0.02-0.8, mu M, with a detection limit (3 sigma) of 14 nM, and shows excellent selectivity for Hg2+ over other metal ions (Cu2+, Co2+, Cd2+, Pb2+, Mg2+, Zn2+, Ag+, Ce3+, Ca2+, Al3+, K+). More importantly, the method avoids complicated surface modifications and tedious separation processes.
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