Preparation and characterization of water-soluble US nanocrystals by surface modification of ethylene diamine

被引：94

作者：

Tang, HX ^{[1
]}

Yan, M ^{[1
]}

Zhang, H ^{[1
]}

Xia, MZ ^{[1
]}

Yang, DR ^{[1
]}

机构：

[1] Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China

来源：

MATERIALS LETTERS | 2005年 / 59卷 / 8-9期

基金：

中国国家自然科学基金;

关键词：

CdS; nanoparticles; surface modification;

D O I：

10.1016/j.matlet.2004.11.049

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The water-soluble US nanoparticles were obtained by hydrogen bond between the cadmium-thiolate complex on the surface of CdS nanoparticles and ethylene diamine (anhydrous). The modified US nanoparticles enhanced its solubility in H2O and alcohol, The ethylene diamine-capped US nanoparticles were characterized by Fourier Transforrn Infrared Spectroscopy (FTIR), photoluminescence (PL) and Ultraviolet-Visible absorption spectrum (UV-Vis spectrum). The absorption peak at 262 nm was observed, which belonged to ethylene diamine-modificated Cd-thiolate complex at the surface of as-grown US nanoparticles. The results of the PL spectra indicated that the modification of CdS nanoparticles reduced effectively the local surface-trap states. Based on the above results, a possible mechanism for the formation of the water-soluble US nanoparticles was discussed (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：1024 / 1027

页数：4

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