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
收藏
页码:595 / 600
页数:6
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