Synthesis and characterization of CdS nanoparticles stabilized by double-hydrophilic block copolymers

被引：321

作者：

Qi, LM ^{[1
]}

Cölfen, H ^{[1
]}

Antonietti, M ^{[1
]}

机构：

[1] Max Planck Inst Colloids & Interfaces, D-14424 Potsdam, Germany

来源：

NANO LETTERS | 2001年 / 1卷 / 02期

关键词：

D O I：

10.1021/nl0055052

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A novel and simple preparation method for single monodisperse CdS nanoparticles with controllable size and stability against oxidation is presented. Double-hydrophilic block copolymers consisting of a solvating poly(ethylene glycol) PEG block and a poly(ethylene imine) PEI binding block have been used as effective stabilizers for the solution synthesis of high-quality US nanoparticles in water and methanol. Absorption, fluorescence spectroscopy, and transmission electron microscopy were employed for characterization, which revealed that the prepared CdS nanoparticles had a well-resolved cubic structure and were monodisperse in size. It was also found that the US nanoparticles; were dispersed in solution as single entities and showed a very good resistance against oxidation for months, according to their polymer shell. The particle size was controllable in the range between 2 and 4 nm by adjusting the polymer concentration and choice of the solvent.

引用

页码：61 / 65

页数：5

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