Heating-induced evolution of thiolate-encapsulated gold nanoparticles: A strategy for size and shape manipulations

被引：307

作者：

Maye, MM ^{[1
]}

Zheng, WX ^{[1
]}

Leibowitz, FL ^{[1
]}

Ly, NK ^{[1
]}

Zhong, CJ ^{[1
]}

机构：

[1] SUNY Binghamton, Dept Chem, Binghamton, NY 13902 USA

来源：

LANGMUIR | 2000年 / 16卷 / 02期

关键词：

D O I：

10.1021/la990892k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A heating treatment strategy for inducing size and shape change of composite nanoparticles in solutions is described. The composite nanoparticles are similar to 2 nn gold cores encapsulated with alkanethiolate monolayers. The development of abilities in size and shape controls constitutes the motivation of this work. We demonstrated a remarkable evolution of the preformed particles in solutions toward monodispersed larger core sizes with well-defined and highly faceted morphologies. The particles thus evolved were encapsulated with the thiolate shells, and exhibited striking propensities of forming long-range ordered arrays. The morphological and structural evolutions were characterized using transmission electron microscopy, X-ray diffraction, UV-vis and infrared spectroscopies. Although temperature-driven crystal growth is known for nonencapsulated particles, the evolution of the thiolate-encapsulated nanoparticles in solutions into well-defined morphologies represents an intriguing example of temperature manipulations in size monodispersity and shape control.

引用

页码：490 / 497

页数：8

共 48 条

[11] SIZE EFFECT ON MELTING TEMPERATURE OF GOLD PARTICLES [J].