Synthesis, morphology and optical properties of thiol-stabilized CdTe nanoclusters in aqueous solution

被引:63
作者
Rogach, AL
Katsikas, L
Kornowski, A
Su, D
Eychmuller, A
Weller, H
机构
[1] BELARUSSIAN STATE UNIV, PHYSICOCHEM RES INST, MINSK 220080, BELARUS
[2] HAHN MEITNER INST BERLIN GMBH, D-14109 BERLIN, GERMANY
来源
BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 1997年 / 101卷 / 11期
关键词
CdTe; clusters; colloides; luminescence; semiconductors;
D O I
10.1002/bbpc.19971011123
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
Thiol-stabilized CdTe nanoclusters with sizes ranging from 1.3 to 2.4 nm have been prepared in aqueous solution and separated as oxidize-stable powders. Investigation of CdTe nanoclusters by means of X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM) indicates the cubic (zincblende phase) CdTe crystalline structure. Pronounced electronic transitions in the absorption spectra are shifted dramatically towards higher energies in comparison with bulk CdTe as a consequence of quantum confinement in nanosized CdTe particles. Two kinds of size-and surface-dependent photoluminescence (''excitonic'' and trapped) of CdTe nanoclusters in aqueous solution were observed. A further growth of CdTe nanoclusters leads to a shift of both absorption edge and ''excitonic'' photoluminescence band towards longer wavelengths.
引用
收藏
页码:1668 / 1670
页数:3
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