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无机材料学报

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CdTe纳米棒的水相合成与铜离子识别研究

郑爱芳1， 陈金龙2   

  1. 安庆师范学院 1.生命科学系； 2.化学化工学院， 安庆 246011
  • 收稿日期:2008-07-01 修回日期:2008-10-08 出版日期:2009-03-20 网络出版日期:2009-03-20

Aqueous Phase Preparation of CdTe Nanorods and its Application
in Recognition of Cu2+ Ions

ZHENG Ai-Fang1, CHEN Jin-Long2   

  1. 1.Department of Life Sciences, Anqing Normal College, Anqing 246011, China; 2. School of Chemistry & Chemical Engineering, Anqing Normal College, Anqing 246011, China
  • Received:2008-07-01 Revised:2008-10-08 Published:2009-03-20 Online:2009-03-20

PDF (PC)

1827

被引次数

17 | 6

摘要： 水相以巯基乙酸和半胱氨酸为混合稳定剂合成了光谱可调的CdTe纳米棒, 具有双波长发射纳米棒被用作铜离子荧光探针. 铜离子加入后, 纳米棒645nm处的缺陷发射显著减弱，535nm处的激子发射未见变化. 在弱碱性条件下，纳米棒缺陷发射强度与铜离子的浓度成良好线性相关，响应区间为 0~2.8×10-6 mol/L，检测下限为4.0×10-9mol/L. 本文初步探讨了铜离子与CdTe纳米棒之间的作用机理.

关键词: CdTe纳米棒, 荧光探针, 猝灭, 铜离子

Abstract: Opticaltunable CdTe nanorods were synthesized in aqueous solution using thioglycoclic acid and L-cysteine as co-stabilizing reagents. CdTe nanorods with dualwavelength emission was appreciated as a novel fluorescent probe for copper ions. Copper ions display a significant quenching effect on the nanorods trap emission at 645nm and no effect on band-edge emission at 535nm. In a slight basic medium, the surface trap emission intensity of nanorods is proportional to the concentration of Cu2+ ion in the range from 0 to 2.8×10-6mol/L, and the corresponding limit of detection is 4.0×10-9mol/L. The mechanism of reaction between CdTe nanorods and Cu2+ ions are discussed in further.

Key words: CdTe nanorods, fluor escence probe, quench, Cu2+ ion

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