Au Nanorice Assemble Electrolytically into Mesostars

被引：36

作者：

Bardhan, Rizia ^{[1
,3
]}

Neumann, Oara ^{[2
,3
]}

Mirin, Nikolay ^{[1
,3
]}

Wang, Hui ^{[1
,3
]}

Halas, Naomi J. ^{[1
,2
,3
]}

机构：

[1] Rice Univ, Dept Chem, Houston, TX 77005 USA

[2] Rice Univ, Dept Elect & Comp Engn, Houston, TX 77005 USA

[3] Rice Univ, Lab Nanophoton, Houston, TX 77005 USA

来源：

ACS NANO | 2009年 / 3卷 / 02期

关键词：

mesostars; nanorice; alpha-FeOOH; alpha-Fe2O3; electrolysis-induced self-assembly; NEEL TEMPERATURE; GOETHITE; DEFECTS; GROWTH; PHASE;

D O I：

10.1021/nn800657t

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Star-shaped mesostructures are formed when an aqueous suspension of Au nanorice particles, which consist of prolate hematite cores and a thin Au shell, is subjected to an electric current. The nanorice particles assemble to form hyperbranched micrometer-scale mesostars. To our knowledge, this is the first reported observation of nanoparticle assembly into larger ordered structures under the influence of an electrochemical process (H2O electrolysis). The assembly is accompanied by significant modifications in the morphology, dimensions, chemical composition, crystallographic structure, and optical properties of the constituent nanoparticles.

引用

页码：266 / 272

页数：7

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