Formation of PbSe nanocrystals: A growth toward nanocubes

被引：118

作者：

Lu, WG

Fang, JY ^{[1
]}

Ding, Y

Wang, ZL

机构：

[1] Univ New Orleans, Dept Chem, New Orleans, LA 70148 USA

[2] Univ New Orleans, Adv Mat Res Inst, New Orleans, LA 70148 USA

[3] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2005年 / 109卷 / 41期

关键词：

D O I：

10.1021/jp052573+

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：

In this paper we report an electron microscopic observation of crystal shape development when PbSe nanocrystals were synthesized using a dynamic injection technique at different temperatures in the presence of oleic acid. A two-step evolution mechanism was proposed, indicating that the shape evolution of PbSe nanocrystals is dependent on the growth time, whereas the crystalline size can be tuned by varying the growth temperature under the studied conditions. It also implies that a higher growth rate in the < 111 > direction compared to that in the < 100 > direction results in the formation of nanocubes.

引用

页码：19219 / 19222

页数：4

共 22 条

[1]

ALLAN G, 2004, CONDENS MATTER MATTE, V70, P9

[2] PbS quantum dots with stable efficient luminescence in the near-IR spectral range [J].