Abstract
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.
Original language | English |
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Pages (from-to) | 77-80 |
Number of pages | 4 |
Journal | Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy |
Volume | 121 |
DOIs | |
Publication status | Published - 5 Mar 2014 |
Scopus Subject Areas
- Analytical Chemistry
- Atomic and Molecular Physics, and Optics
- Instrumentation
- Spectroscopy
User-Defined Keywords
- Cyanide recognition
- Fluorescence probe
- Gold nanoclusters