晶体孪晶
材料科学
磷化铟
纳米线
超晶格
磷化镓
光电子学
铟
磷化物
纳米技术
砷化镓
冶金
微观结构
镍
作者
Rienk E. Algra,Marcel A. Verheijen,Magnus T. Borgström,L. F. Feiner,George Immink,W.J.P. van Enckevort,Elias Vlieg,Erik P. A. M. Bakkers
出处
期刊:Nature
[Springer Nature]
日期:2008-11-01
卷期号:456 (7220): 369-372
被引量:634
摘要
Here, we show that we control the crystal structure of indium phosphide (InP) nanowires by impurity dopants. We have found that zinc decreases the activation barrier for 2D nucleation growth of zinc-blende InP and therefore promotes the InP nanowires to crystallise in the zinc blende, instead of the commonly found wurtzite crystal structure. More importantly, we demonstrate that we can, by controlling the crystal structure, induce twinning superlattices with long-range order in InP nanowires. We can tune the spacing of the superlattices by the wire diameter and the zinc concentration and present a model based on the cross-sectional shape of the zinc-blende InP nanowires to quantitatively explain the formation of the periodic twinning.
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