A Rapid Hot-Injection Method for the Improved Hydrothermal Synthesis of CdSe Nanoparticles

被引：26

作者：

Williams, Juandria V. ^{[1
]}

Kotov, Nicholas A. ^{[1
]}

Savage, Phillip E. ^{[1
]}

机构：

[1] Univ Michigan, Dept Chem Engn, Ann Arbor, MI 48109 USA

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2009年 / 48卷 / 09期

关键词：

D O I：

10.1021/ie8007067

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Cadmium selenide (CdSe) quantum dots were prepared in high-temperature water via a rapid hot-injection method intended to mimic conventional synthesis in organic solvents. The nanocrystals were smaller than those previously produced hydrothermally under nonisothermal conditions when using the same process parameters. It is possible that the nucleation and growth events were greatly influenced by the present injection method. In general, the physical and optical properties of the nanocrystals were influenced by the experimental conditions. Variations in reaction temperature (200-240 degrees C), reaction time (1-10 min), pH (7-11), Cd:Se molar ratio (4:1-40:1) and Cd:stabilizer molar ratio (0.24-1.18) affected the mean particle size, distribution of sizes, and quantum yield. As-prepared nanoparticles exhibited quantum yields in excess of 5%.

引用

页码：4316 / 4321

页数：6

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