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期刊论文

Versatile Route to the Controlled Synthesis of Multilevel Branched Silicon Submicrometer/ Nanostructures

高义华Min Sun Yihua Gao Jun Su Xiangyun Han Xianghui Zhang Qi Zhang Guozhen Shen Aiqing Zhang Lei Jin and Jianbo Wang

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摘要/描述

A variety of silicon based multilevel branched submicrometer/ nanostructures, such as branched nanowheatheads, big branched nanowheat-heads, and branched nanowires, have been rationally synthesized via a simple one-step, inexpensive, and catalyst-free fabrication technique. High-resolution transmission electron microscopy studies suggested that the main stem of wheat head and the nanotips of silicon branched nanowheat-heads are single crystals with the preferential growth direction along the [112] and [112] and orientation, respectively. Compared with big branched nanowheat-heads and branched nanowires, the room-temperature Raman frequency of branched nanowheat-heads is blue-shifted and its full width at half-maximum broadens. A moderately strong photoluminescence emission at 550 nm was suggested to be induced by defects, such as stacking faults or the SiOx surface in the branched nanowheat-heads, suggesting potential applications in light-emitting nanodevices. These studies shed light on new opportunities for fabricating different 3-dimensional nanostructures based on their property investigation.

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版权说明:以下全部内容由高义华上传于   2009年12月03日 21时21分03秒,版权归本人所有。

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