TITLE

Fe-catalyzed growth of one-dimensional α-Si3N4 nanostructures and their cathodoluminescence properties

AUTHOR(S)
Juntong Huang; Zhaohui Huang; Shuai Yi; Yan'gai Liu; Minghao Fanga; Shaowei Zhang
PUB. DATE
December 2013
SOURCE
Scientific Reports;12/20/2013, p1
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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.
ACCESSION #
93310211

 

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