Luminescent CdTe quantum dots and nanorods as metal ion probes

被引：50
|
作者：
Li, J [1 ]
Bao, DS
Hong, X
Li, D
Li, JH [1 ]
Bai, YB
Li, TJ
机构：
[1] Jilin Univ, Coll Chem, Changchun 130023, Peoples R China
[2] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China
[3] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Changchun 130022, Peoples R China
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2005年 / 257-58卷
关键词：
CdTe QDs; CdTe nanorods; enhancement; quenching; metal ions;
D O I：
10.1016/j.colsurfa.2004.10.034
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Water-soluble luminescent thiol-capped CdTe QDs and nanorods have been synthesized and used to investigate the effect on their photoluminescence (PL) responses to divalent metal ions, such as zinc, calcium, magnesium, manganese, nickel, and cobalt ions. The change trends of PL were nearly, similar for both CdTe QDs and nanorods. The zinc ions enhanced the photoluminescence, while the manganese, nickel, and cobalt ions quenched the PL. The effect on the PL response of CdTe QDs to divalent metal ions could be described by Langmuir-type binding model or Stern-Volmer-type equation. The CdTe nanorods were more sensitive to metal cations than QDs. and their enhancement mechanisms are different. CdTe QDs and nanorods maybe used as selective ion probes and developed as fluorescence sensors. (c) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：267 / 271
页数：5
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