文献类型：期刊文献

英文题名：A simple and sensitive sensor for silver ions based on unmodified gold nanoparticles by using dynamic light scattering techniques

作者：Xiao, Zhiyou Tang, Anjiang Huang, Hongsheng Wang, Ze

第一作者：肖志友

通信作者：Xiao, ZY[1]|[14440ef2cf80e422d3de7]肖志友;

机构：[1]Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Guizhou, Peoples R China

第一机构：贵州理工学院化学工程学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Guizhou, Peoples R China.|贵州理工学院化学工程学院;贵州理工学院;

年份：2017

卷号：95

期号：12

起止页码：1267-1272

外文期刊名：CANADIAN JOURNAL OF CHEMISTRY

收录：;EI(收录号：20174704443938);Scopus(收录号：2-s2.0-85034660014);WOS:【SCI-EXPANDED(收录号:WOS:000415757500005)】；

基金：This work was supported by the National Natural Science Foundation of China (No. 2150344) and the Science and Technology Foundation of Guizhou Province (Qian Ke He J[2013] No. 2263) and Guizhou Education and Science Project (No. 2015A058).

语种：英文

外文关键词：dynamic light scattering; silver ions; sensors; unmodified gold nanoparticles

摘要：A simple and sensitive assay for Ag+ was developed with unmodified gold nanoparticles (AuNPs) by using dynamic light scattering techniques. Ag+ could induce the oligonucleotide (5'-ATC ACT ATA TCA TAT ACT CAT-3') to change from a single-stranded structure to a double-stranded structure and desorb from the surface of AuNPs, which triggered the aggregation of AuNPs in the salt solution. The average hydrodynamic diameter of aggregated AuNPs could be detected by using dynamic light scattering techniques. Under the optimum conditions, the average hydrodynamic diameter of AuNPs is proportional to the concentration of Ag+ within the range of 13.3-100.0 nmol/L, with a detection limit of 3.2 nmol/L. The method is easy to operate and has low sample consumption, high sensitivity and selectivity.