Anomalous packing in thin nanoparticle supercrystals

被引：34

作者：

Zanchet, D

Moreno, MS

Ugarte, D

机构：

[1] Lab Nacl Luz Sincrotron, BR-13083970 Campinas, SP, Brazil

[2] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13081970 Campinas, SP, Brazil

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 26期

基金：

巴西圣保罗研究基金会;

关键词：

D O I：

10.1103/PhysRevLett.82.5277

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report a structural study of gold nanoparticle supercrystals formed by a few layers and of micrometer size, where the long-range order has been stimulated by a soft thermal annealing. We have clearly identified an expansion of the first layer lying on amorphous carbon substrate and an ordered second layer sitting on twofold saddle points. The third nanoparticle layer recovers the conventional close-packed stacking. This anomalous packing has been explained by means of a simple theoretical model based on dispersional forces.

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页码：5277 / 5280

页数：4

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