物理化学学报 >> 2008, Vol. 24 >> Issue (04): 725-728.doi: 10.3866/PKU.WHXB20080432

研究简报 上一篇    下一篇

氨基酸对CdTe量子点荧光性质的影响

文立群; 吕鉴泉; 吕汉清; 周兴旺; 孙婷荃   

  1. 湖北师范学院生化分析技术湖北省重点实验室, 湖北 黄石 435002; 华中师范大学化学学院, 武汉 430079
  • 收稿日期:2007-10-17 修回日期:2007-12-10 发布日期:2008-04-07
  • 通讯作者: 吕鉴泉 E-mail:jianquanlu@eyou.com

Effect of Amino Acid on the Fluorescence of CdTe Quantum Dots

WEN Li-Qun; LV Jian-Quan; LV Han-Qing; ZHOU Xing-Wang; SUN Ting-Quan   

  1. Hubei Key Laboratory of Bioanalytical Technique, Hubei Normal University, Huangshi 435002, Hubei Province, P. R. China; College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
  • Received:2007-10-17 Revised:2007-12-10 Published:2008-04-07
  • Contact: LV Jian-Quan E-mail:jianquanlu@eyou.com

摘要: 以巯基乙酸为稳定剂, 制备了水溶性碲化镉(CdTe)量子点(QDs), 分别考察了pH值和几种氨基酸对CdTe-QDs紫外吸收和荧光的影响. 结果表明, 在不同pH值下, 丙氨酸、丝氨酸、半胱氨酸对CdTe-QDs的荧光有不同的影响, 丙氨酸、丝氨酸使CdTe-QDs荧光发生猝灭现象, 而半胱氨酸在碱性范围内则使CdTe-QDs的荧光明显增强, 说明氨基酸对量子点存在不同的作用机制.

关键词: CdTe量子点, 氨基酸, 荧光

Abstract: Water-soluble CdTe quantum dots (GdTe-Qs) were prepared using mercaptocarboxylic acid as stabilizer, and effects of pH and amino acids on fluorescence of CdTe-QDs were investigated. The results revealed that the fluorescence of the CdTe-QDs varied with the change of pH, and the alanine and serine could quench the fluorescence while cysteine enhanced the fluorescence.

Key words: CdTe quantum dots, Amino acid, Fluorescence

MSC2000: 

  • O644