The formation and characterization of three-dimensional gold nanocrystal superlattices

被引：14

作者：

Constantinides, Michael G. ^{[2
]}

Jaeger, Heinrich M. ^{[2
]}

Li, Xuefa ^{[3
]}

Wang, Jin ^{[3
]}

Lin, Xiao-Min ^{[1
]}

机构：

[1] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA

[2] Univ Chicago, James Franck Inst, Chicago, IL 60637 USA

[3] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

来源：

ZEITSCHRIFT FUR KRISTALLOGRAPHIE | 2007年 / 222卷 / 11期

基金：

美国国家科学基金会;

关键词：

nanocrystals; nanoparticles; self-assembly; GISAXS; supercrystals; superlattices;

D O I：

10.1524/zkri.2007.222.11.595

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Highly-ordered, three-dimensional superlattices were self-assembled from dodecanethiol-ligated gold nanocrystals using a simple drop-drying technique. The superlattices had the shape of truncated pyramids (frustums) and reached lateral dimensions of several micrometers. The formation and thermal stability were studied by grazing-incidence small-angle X-ray scattering. We found that the superlattice frustums adopt an hcp packing structure. When annealed above 50 degrees C in vacuum, the lattices started to disorder and the average lattice spacing was observed to decrease. This could be associated with the onset of a ligand melting transition as well as the continuous desorption of ligands in vacuum.

引用

页码：595 / 600

页数：6