Department of Chemistry
Lysozyme-stabilized gold nanoclusters as a novel fluorescence probe for cyanide recognition
Lysozyme-stabilized gold nanoclusters (Lys-AuNCs) have been synthesized and utilized as a fluorescent probe for selective detection of cyanide (CN -). Lys-AuNCs had an average size of 4 nm and showed a red emission at 650 nm (λex = 370 nm). The fluorescence of Lys-AuNCs could be quenched by CN-. An excellent sensitivity and selectivity toward the detection of CN- in aqueous solution was observed. The fluorescence intensity was linear with the CN- concentration in the range of 5.00 × 10-6 M-1.20 × 10-4 M with a detection limit as low as 1.9 × 10-7 M. Also, the addition of CN- to Lys-AuNCs could induce an obvious color change from light yellow to colorless. Correspondingly, a bright red fluorescence disappeared and a blue fluorescence appeared. The results indicated that Lys-AuNCs could be applied in detection of cyanide on environmental aspects. © 2013 Published by Elsevier B.V.
Cyanide recognition, Fluorescence probe, Gold nanoclusters
Source Publication Title
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Lu, Dongtao, Lili Liu, Fengxia Li, Shaomin Shuang, Yingfu Li, Matin M.F. Choi, and Chuan Dong. "Lysozyme-stabilized gold nanoclusters as a novel fluorescence probe for cyanide recognition." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 121 (2014): 77-80.