Synthesis and Spectral Studies of Functionalized L-Cys-CdS Nanoparticles as Fluorescence Probes
DAI Mei-ling1, YAN Zheng-yu1*, PANG Dai-wen2, SHAO Xiu-fen1, QU Ping1, ZHAO Jing-tian1
1. Department of Analytical Chemistry, China Pharmaceutical University, Nanjing 210038, China 2. College of Chemistry and Molecule, Wuhan University, Wuhan 430072, China
Abstract：In this work, nano-CdS was successfully prepared. The nano-CdS was also modified with L-cysteine. Absorption and fluorescence spectra of CdS nanoparticles for different pH values, reaction times and different Cys/Cd2+/S ratios were investigated. Meanwhile a fluorescence enhancing effect was observed between trace zinc ions and the functionalized L-Cys-CdS nanoparticles. The response is linearly proportional to the concentration of zinc ions from 1.0 to 15 μmol·L-1. The functionalized nanoparticles are hopeful of use as fluorescence probes in detecting trace elements in biological samples.
Key words：CdS;L-cysteine;Nanoparticles;Fluorescence enhancing;Zinc ion
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