Structural characterization of US nanoparticles grown in polystyrene matrix by thermolytic synthesis

被引：59

作者：

Antolini, F ^{[1
]}

Pentimalli, M ^{[1
]}

Di Luccio, T ^{[1
]}

Terzi, R ^{[1
]}

Schioppa, M ^{[1
]}

Re, M ^{[1
]}

Mirenghi, L ^{[1
]}

Tapfer, L ^{[1
]}

机构：

[1] ENEA, Ctr Ric Brindisi, I-72100 Brindisi, Italy

来源：

MATERIALS LETTERS | 2005年 / 59卷 / 24-25期

关键词：

heat treatment; CdS; semiconductors; nanocomposites;

D O I：

10.1016/j.matlet.2005.05.047

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cadmium sulfide nanoparticles embedded in a polystyrene matrix (CdS/PS) were successfully prepared by in situ thermolysis of a cadmium thiolate precursor dispersed in the polymer. The heat-induced formation of cadmium sulfide was studied by thermogravimetric analysis and differential thermal analysis, while the chemistry of the reaction forming the CdS/PS compound was investigated by nuclear magnetic resonance and X-ray photoelectron spectroscopy. The structural characterization was performed by X-ray diffraction and transmission electron microscopy. The CdS nanocrystals are single crystals of cubic phase (zincblende structure) of spherical shape. The average diameter of the nanocrystals embedded in the polystyrene matrix achieved by our synthesis process is as small as 2.5 +/- 0.5 nm. Room temperature UV-VIS absorption spectra exhibit a shoulder at 412 nm that is consistent with the presence of CdS nanocrystals of circle divide approximate to 2 nm. The role of the polymer on the nanoparticle growth was also discussed. (C) 2005 Elsevier B.V. All rights reserved.

引用

页码：3181 / 3187

页数：7

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