Novel synthesis of ultra-long single crystalline β-SiC nanofibers with strong blue/green luminescent properties

Novel synthesis of ultra-long single crystalline β-SiC nanofibers with strong blue/green luminescent properties
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具有强蓝/绿光发光特性的超长单晶β-SiC纳米纤维的新合成

DOI:
10.1016/j.ceramint.2015.11.158
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发表时间:
2016-02
影响因子:
5.2
通讯作者:
张少伟
张少伟
中科院分区:
材料科学1区
文献类型:
--
作者:
刘新红;贾全利;黄军同;张少伟

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以硅和酚醛树脂为原料,采用熔盐化学气相沉积法,在1350℃下,在涂覆了Ni(NO3)2的石墨毡上成功地制备出了直径为100~300 nm、长度可达数百微米的超长单晶β-SiC纳米纤维。纳米纤维具有近乎完美的晶体结构,并带有少量的堆积缺陷。碳化硅纳米纤维的生长过程由气-液-固基生长和气固针尖生长机制相结合决定。所合成的碳化硅纳米纤维具有很强的蓝绿色发光性能,在发光二极管和光电纳米器件中具有潜在的应用前景。
Ultra-long single crystalline β-SiC nanofibers were successfully prepared on a Ni(NO3)2coated graphite felt by a facile molten-salt-mediated chemical vapor deposition route using silicon and phenolic resin as starting materials at 1350 °C. The as-synthesized SiC nanofibers were 100–300 nm in diameter and hundreds of microns up to millimeters in length. The nanofibers possessed a near-perfect crystal microstructure with tiny amounts of stacking faults. The growth process of the SiC nanofibers was determined by the combination of vapor–liquid–solid base-growth and vapor–solid tip-growth mechanism. The as-synthesized SiC nanofibers exhibited strong blue-green luminescent properties, making possible potential application in the LED and optoelectronic nanodevices.
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