文章基本信息

标题：Fe-catalyzed growth of one-dimensional α-Si₃N₄ nanostructures and their cathodoluminescence properties
本地全文：下载
作者：Juntong Huang ; Zhaohui Huang ; Shuai Yi 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2013
卷号：3
DOI：10.1038/srep03504
出版社：Springer Nature
摘要：Preparation of nanomaterials with various morphologies and exploiting their novel physical properties are of vital importance in nanoscientific field. Similarly to the III-N compound semiconductors, Si₃N₄ nanostructures also could be potentially used for making optoelectronic devices. In this paper, we report on an improved Fe-catalyzed chemical vapour deposition method for synthesizing ultra-long α-Si₃N₄ nanobelts along with a few nanowires and nanobranches on a carbon felt substrate. The ultra-long α-Si₃N₄ nanobelts grew via a combined VLS-base and nanobranches via a combined double-stage VLS-base and VS-tip mechanism, as well as nanowires via VLS-tip mechanism. The three individual nanostructures showed variant optical properties as revealed by a cathodoluminescence spectroscopy. A single α-Si₃N₄ nanobelt or nanobranch gave a strong UV-blue emission band as well as a broad red emission, whereas a single α-Si₃N₄ nanowire exhibited only a broad UV-blue emission. The results reported would be useful in developing new photoelectric nanodevices with tailorable or tunable properties.