Nanostructures of pyrolytic carbon from a polyacetylene thin film
Nanostructures of pyrolytic carbon from a polyacetylene thin film
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DOI：
10.1016/s0008-6223(02)00263-4
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发表时间：
2003-01-01
期刊：
影响因子：
10.9
通讯作者：
Koga, Y
中科院分区：
文献类型：
--
作者：
Goto, A;Kyotani, M;Koga, Y
聚乙炔薄膜在500 ~ 1000 T的温度下真空热解碳化。采用Ziegler-Natta催化剂合成了反式聚乙炔薄膜。热解后残留低于原始PA膜重量20%的黑色炭。利用拉曼散射光谱、X射线衍射、扫描电镜和透射电镜对黑焦的结构和形貌进行了研究。在800 T热解温度下，PA膜的脱氢和碳化基本完成.然而，在本工作中，在所有热解温度下获得的黑色焦中包含数十纳米尺寸的中空球形或椭圆形纳米颗粒，其由石墨结构组成。讨论了PA晶体中纳米石墨晶体的形成机理。(C)2003爱思唯尔科技有限公司版权所有。
Pyrolysis of a polyacetylene thin film has been performed in order to carbonize at temperatures of 500 to 1000 T in vacuum. A trans-polyacetylene thin film was synthesized using a Ziegler-Natta catalyst. A black char below 20% in weight of the original PA film remained after pyrolysis. Structural properties and morphology of the black chars were investigated using Raman scattering spectrum, X-ray diffraction measurements, and scanning and transmission electron microscopy. Dehydrogenation and carbonization of the PA film were almost finished at a pyrolysis temperature of 800 T. However, hollow spherical or elliptical nano-particles of tens of nanometers in size, which are composed of graphite structure, were included in the black chars obtained at all pyrolysis temperatures in this work. The formation mechanism of a graphite crystal in nanometer size from a PA crystal was discussed. (C) 2003 Elsevier Science Ltd. All rights reserved.