期刊
CRYSTAL GROWTH & DESIGN
卷 13, 期 1, 页码 10-14出版社
AMER CHEMICAL SOC
DOI: 10.1021/cg301399a
关键词
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资金
- National Natural Science Foundation of China [51032007, 50972134]
- New Star Technology Plan of Beijing [2007A080]
- University of Western Australia
Ultra long single crystal Sialon nanobelts were prepared on a graphite cover coated with Ni(NO3)(2) by facile thermal chemical vapor deposition reactions of Si, Al, and Al2O3 with flowing N-2 at 1450 degrees C. The as-synthesized Sialon nanobelts were up to several millimeters long and several hundred nanometers wide, and they had width/thickness ratios of 5-15. Their growth process was codominated by a Ni-catalytic vapor-liquid-solid (VLS) base-growth mechanism and a vapor solid (VS) tip-growth mechanism. The former was responsible for the initial nucleation and proto-nanobelt formation of Sialon and the subsequent growth along the [100] direction, and the latter additionally contributed the growth at tips. The room-temperature photoluminescence (PL) spectrum showed that the as-synthesized Sialon nanobelts had a special emission with two maximum peaks at 409 rim (3.03 eV) and 428 nm (2.90 eV) located in the violet-blue spectral range, making possible potential applications in LED and optoelectronic nanodevices.
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