Aggregation-induced emission from gold nanoclusters for use as a luminescence-enhanced nanosensor to detect trace amounts of silver ions

Journal of Colloid and Interface Science
Bingzhi LiXuemin Zhou

Abstract

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 0.5nM-20μM with a limit of detection of 0.2nM and it showed great promise for Ag(+) monitoring in environmental water.

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Citations

Nov 15, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·U Divya Madhuri, T P Radhakrishnan
Mar 7, 2019·Chemical Society Reviews·Xi Kang, Manzhou Zhu
Jan 2, 2019·Analytica Chimica Acta·Bingzhi LiXuemin Zhou
Jan 27, 2021·Nanomaterials·Luca BurrattiPaolo Prosposito
Mar 23, 2019·Journal of Colloid and Interface Science·Youkun ZhengXuemei Wang
Jul 21, 2021·Chemical Reviews·W Russ AlgarHyungki Kim

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