| 光谱学与光谱分析 |
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| Properties of Synthesized CdS Nanoparticles by Reverse Micelle Method |
| LI Heng-da1,WANG Qing-wei1*,ZHAI Hong-ju1,LI Wen-lian1, 2 |
1. School of Chemistry in Jilin Normal University, Siping 136000, China
2. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China |
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Abstract Micelle system with reverse phase (water/CTAB/n-hexyl alcohol/n-heptane) is a weenie liquid-globelet of surface active agent molecule which can be stably and uniformly dispersed in continuous oil medium. The micelle system with reverse phase can work as a “micro-reactor” to synthesize CdS nano-particle with excellent performance. In the present article considering the effects of W value (W=[water]/[surface agent]) of the micelle system with reverse phase, we observed that the ratio of [Cd2+] and [S2-] ions to the original concentrations of the Cd2+ and S2- ions can affect the luminescent properties of CdS nano-particle. Using regurgitant treatment process the surface of CdS nano-particle can be modified, and as a result the defect emission was reduced and even disappeared, but exciton emissions markedly increased. On the other hand, a red-shift of the exciton emission peak with the increase in the particle size was observed, indicating considerable quantum confinement effect. A maximum quantum efficiency of 11% for the synthesized CdS nano-material was achieved.
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Received: 2008-02-10
Accepted: 2008-05-20
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Corresponding Authors:
WANG Qing-wei
E-mail: Wqw611223@163.com
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