Step-Wise Synthesis of InP/ZnS Core-Shell Quantum Dots and the Role of Zinc Acetate

被引：130

作者：

Ryu, Euidock ^{[1
]}

Kim, Sungwoo ^{[1
]}

Jang, Eunjoo

Jun, Shinae

Jang, Hyosook

Kim, Byungki

Kim, Sang-Wook ^{[1
]}

机构：

[1] Ajou Univ, Dept Mol Sci & Technol, Suwon 443749, South Korea

来源：

CHEMISTRY OF MATERIALS | 2009年 / 21卷 / 04期

关键词：

HIGH-QUALITY INP; LONG-TERM; NANOCRYSTALS; CDSE; PHOSPHIDE; TOXICITY;

D O I：

10.1021/cm803084p

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：

The stepwise synthesis of InP/ZnS core shell quantum dots and the role of zinc acetate was investigated. The existence of zinc was confirmed by Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES) after surfactant exchange and infrared spectroscopy revealed the exchange of surfactants clearly. A slight increase in quantum yield was obtained using zinc acetylacetonate (Zn(acac)2) as a zinc precursor instead of zinc acetate. The quantum dots were transferred to water to check the stability of the ZnS shell, and highly luminescent water-dispersible quantum dots. Powder X-ray diffraction showed that the zinc blend structure of the InP/ZnS QDs were evident. A highly luminescent and stable InP/ZnS core-shell nanocrystals were developed by stepwise addition of zinc acetate and dodecanethiol to an InP core solution. It was observed that zinc acetate plays an important role in surface etching and ZnS shell formation.

引用

页码：573 / 575

页数：3

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