Interaction Between CdS Nanoparticles and Cysteine

Abstract

Abstract: CdS nanoparticles were synthesized and their spectra properties were studied. At the same time, the interaction mechanisms between CdS nanoparticles and cysteine and cysteine were investigated under different experimental conditions such as pH values, concentrations of cysteine and molar ratios of CdCl₂, CH₃CSNH₂. After cysteine being added to the CdS nanoparticles, the fluorescence intensity of CdS nanoparticles was stronger and their emission peak did not change at pH before isoelectric point, while the fluorescence intensity became stronger at the beginning and then quenched and the emission peak was red-shifted at pH values after isoelectric point. It’s proved that coordination interaction and electrostatic interaction were the two interaction forms between CdS and cysteine, which influenced the variations of fluorescence intensity, emission peak and bandgap of CdS nanoparticles at different pH balues before and after isoelectric point.

Key words: CdS nanoparticles, Cysteine, Fluorescence spectrum

CLC Number:

O657.3

TrendMD:

LIU Hui, LI Wen-You, YIN Hong-Zong, HE Xi-Wen, MEI Fang, CHEN Lang-Xing. Interaction Between CdS Nanoparticles and Cysteine[J]. Chem. J. Chinese Universities, 2005, 26(9): 1613.

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Interaction Between CdS Nanoparticles and Cysteine

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