Nanopatterning by solid-state dewetting on reconstructed ceramic surfaces

被引：33

作者：

Basu, Joysurya ^{[1
]}

Carter, C. Barry ^{[1
]}

Divakar, R. ^{[2
]}

Mukherjee, B. ^{[3
]}

Ravishankar, N. ^{[3
]}

机构：

[1] Univ Connecticut, Dept Chem Mat & Biomol Engn, Storrs, CT 06269 USA

[2] Indira Gandhi Ctr Atom Res, Div Phys Met, Kalpakkam 603102, Tamil Nadu, India

[3] Indian Inst Sci, Mat Res Ctr, Bangalore 560012, Karnataka, India

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 17期

关键词：

ceramics; chemical potential; diffusion; gold; metallic thin films; nanoparticles; nanopatterning; nanowires; nucleation; surface reconstruction; transmission electron microscopy; wetting; METALLIC-FILMS; THIN-FILMS; NUCLEATION; GROWTH; SILICON; OXIDES;

D O I：

10.1063/1.3127442

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate ordered array formation of Au nanoparticles by controlled solid-state dewetting of a metal film on stepped alumina substrates. In situ transmission electron microscopy studies reveal that the dewetting process starts with nucleation of ordered dry regions on the substrate. The chemical potential difference between concave and convex surface regions induces anisotropic metal diffusion leading to the formation of nanowires in the valleys. The nanowires fragment due to Rayleigh instability forming arrays of metal nanoparticles on the substrate. The length scale of reconstruction relative to the starting film thickness is an important parameter in controlling the spatial order of the nanoparticles.

引用

页数：3

共 25 条

[1] Modified electron-beam-induced deposition of metal nanostructure arrays using a parallel electron beam [J].