Spontaneous Growth of Superstructure α-Fe2O3 Nanowire and Nanobelt Arrays in Reactive Oxygen Plasma

被引：195

作者：

Cvelbar, Uros ^{[1
]}

Chen, Zhiqiang ^{[3
]}

Sunkara, Mahendra K. ^{[2
,3
]}

Mozetic, Miran ^{[1
]}

机构：

[1] Jozef Stefan Inst, SL-1000 Ljubljana, Slovenia

[2] Univ Louisville, Dept Chem Engn, Louisville, KY 40292 USA

[3] Univ Louisville, Inst Adv Mat & Renewable Energy, Louisville, KY 40292 USA

来源：

SMALL | 2008年 / 4卷 / 10期

基金：

美国能源部;

关键词：

iron oxide; nanobelts; nanowires; oxygen plasma;

D O I：

10.1002/smll.200800278

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A study was conducted to demonstrate the spontaneous growth of superstructure α-Fe2O3 nanowire and nanobelt arrays in reactive oxygen plasma. A systematic investigation of the experimental conditions were conducted to understand both nucleation and growth mechanisms that are responsible for promoting the growth of nanowires and nanobelts in our plasma oxidation scheme. The nucleation occurs spontaneously everywhere on the plasma-treated substrate, although further growth of the nuclei differs, depending on the substrate temperature. The resulting nanowires are thinner when the surface temperature is lower or when the neutral atom flux is constant and the ion flux approaches zero. The study concluded that the conceptual understanding of the nucleation and growth stages will help in designing plasma oxidation processes for other metal oxide nanowire systems.

引用

页码：1610 / 1614

页数：5

共 28 条

[1] A facile route for high-throughput formation of single-crystal α-Fe2O3 nanodisks in aqueous solutions of Tween 80 and triblock copolymer [J].