物理化学学报 >> 2000, Vol. 16 >> Issue (05): 431-436.doi: 10.3866/PKU.WHXB20000511

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CdS纳米粒子的表面修饰及其对光学性质的影响

张宇, 付德刚, 蔡建东, 朱春霞, 刘举正, 陆祖宏   

  1. 东南大学化学化工系，国家分子与生物分子电子学实验室，南京 210096
  • 收稿日期:1999-09-13 修回日期:1999-11-15 发布日期:2000-05-15
  • 通讯作者: 付德刚

Surface-modification of CdS Nanoparticle and its Optical Properties

Zhang Yu, Fu De-Gang, Cai Jian-Dong, Zhu Chun-Xia, Liu Ju-Zheng, Lu Zu-Hong   

  1. Department of Chemistry and Chemical Engineering,National Laboratory of Molecular and Biomolecutar Electronics,Southeast University,Nanjing 210096
  • Received:1999-09-13 Revised:1999-11-15 Published:2000-05-15
  • Contact: Fu De-Gang

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摘要：

用反胶束法合成了用表面活性剂分子磺基琥珀酸双-2-乙基己酯钠盐 (AOT)进行表面修饰的CdS纳米粒子 (记为CdS/AOT-SO-3) ,研究了这种纳米粒子在正庚烷(heptane)和吡啶 (Py)溶剂中的荧光及光解行为 .发现其在正庚烷中荧光很强 ,而Py却强烈地猝灭CdS纳米粒子的荧光 ,用电荷转移猝灭机制进行了解释 .这种解释为CdS纳米粒子在Py中光解实验进一步证实.

关键词: CdS纳米粒子, 表面修饰, 荧光粗灭, 光解

Abstract:

The surface-modified CdS nanoparticle (named as CdS/AOTSO- 3) with surfactant, AOT, was synthesized by reverse micelle method. The fluorescence properties and photolysis behavior of this CdS were studied in heptane and pyridine. The results show that the fluorescence of the CdS nanoparticle is intense in heptane, but is strongly quenched by pyridine. These results are explained by the charge-transfer quenching mechanism. The viewpoint is also further proved by the photolysis experiments of the CdS nanoparticle in pyridine.

Key words: CdS nanoparticle, Surface-modification, Fluorescence quenching, Photolysis