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Electrodeposited bismuth telluride nanowire arrays with uniform growth fronts

机译:具有均匀生长前沿的电沉积碲化铋纳米线阵列

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摘要

Bismuth telluride (Bi2Te3) nanowires were deposited into porous alumina templates with 35 nm diameter pores by a pulsed-potential electrodeposition method. For growth at temperatures between 1 and 4 degrees C, the nanowires filled 93% of the pores of the template, and the growth fronts were uniform with nanowire lengths of similar to 62-68 mu m. There are over ten billion nanowires per square centimeter with aspect ratios approaching 2000:1. Samples were characterized by scanning and transmission electron microscopy, X-ray diffraction, and electron microprobe analysis. The crystalline nanowire arrays are highly oriented in the [110] direction, which is optimal for thermoelectric applications.
机译:通过脉冲电位电沉积法将碲化铋(Bi2Te3)纳米线沉积到具有35 nm直径孔的多孔氧化铝模板中。对于在1到4摄氏度之间的温度下生长,纳米线填充了模板孔的93%,并且生长前沿是均匀的,纳米线的长度接近62-68微米。每平方厘米有超过一百亿个纳米线,长宽比接近2000:1。通过扫描和透射电子显微镜,X射线衍射和电子显微探针分析对样品进行表征。晶体纳米线阵列在[110]方向上高度定向,这是热电应用的最佳选择。

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