Self-embedded nanocrystalline chromium carbides on well-aligned carbon nanotips
Self-embedded nanocrystalline chromium carbides on well-aligned carbon nanotips
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在排列良好的碳纳米尖端上自嵌入纳米晶碳化铬
DOI：
10.1063/1.1579867
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
Chia
中科院分区：
文献类型：
--
作者：
C. Tsai;Jung;Chia
采用微波等离子体化学气相沉积的方法，在衬底上直接生长了碳化铬纳米颗粒。这些纳米材料长约1μm，直径约60 nm，具有较高的长径比。与中空结构的碳纳米管相比，透射电子显微镜图像显示其实体是由石墨和尖端的纳米碳化铬组成的。这些纳米材料在场发射应用中表现良好，开启场强为1.38V/μm，开启场强为565V/μA/μm。我们的结果证实了在碳纳米尖端上自嵌入纳米晶材料的可能性。
Well-aligned carbon nanotips embedded with nanocrystalline chromium carbide were directly grown on a substrate by microwave plasma chemical vapor deposition. These nanomaterials grew up to about 1 μm long and 60 nm in diameter, yielding a high aspect ratio. In comparison between carbon nanotubes with hollow structure, transmission electron microscopy images show its solid body, which is made of graphite along with nanocrystalline chromium carbide on the tip. These nanomaterials perform well in field emission applications with a turn-on field of 1.38 V/μm and 565 μA/cm2 at 2.2 V/μm. Our result confirms the possibility of the self-embedded nanocrystalline materials on the top of carbon nanotips.