期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 467, 期 -, 页码 90-96出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2016.01.002
关键词
Gold nanoclusters; Aggregation-induced emission; Luminescence enhancement; Silver ions; Charge transfer
资金
- National Natural Science Foundation of China [81572081, 81273480, 21175070]
Several research have reported that silver ions (Ag+) could enhance the photoluminescence of some kinds of gold nanoclusters (AuNCs), and redox reaction involved mechanisms were recognized as the main reason to cause such phenomenon. However, in this work, we found that Ag+ could enhance the luminescence of aggregation-induced emission gold nanoclusters (AIE-AuNCs) without valence state change. Upon addition of Ag+, the luminescence of AIE-AuNCs enhanced instantly by 7.2 times with a red-shift of emission peak and a complete restoration of luminescence features was observed when Ag+ was removed. A cost-effective, rapid-response, highly sensitive and selective method to detect trace amount of Ag+ has thereby been established using AIE-AuNCs as a nanosensor. This analytical method exhibited a linear range of 0.5 nM-20 mu M with a limit of detection of 0.2 nM and it showed great promise for Ag+ monitoring in environmental water. (C) 2016 Elsevier Inc. All rights reserved.
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