Fullerene nanostructure-induced excellent mechanical properties in hydrogenated amorphous carbon
Fullerene nanostructure-induced excellent mechanical properties in hydrogenated amorphous carbon
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DOI：
10.1063/1.2794017
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发表时间：
2007-10
影响因子：
4
通讯作者：
Qi Wang;Chengbing Wang;Zhou Wang;Junyan Zhang;D. He
中科院分区：
文献类型：
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作者：
Qi Wang;Chengbing Wang;Zhou Wang;Junyan Zhang;D. He
采用直流脉冲等离子体化学气相沉积法制备了氢化非晶碳薄膜。所制备的薄膜的结构，其特征在于通过透射电子显微镜，拉曼光谱，和X-射线光电子能谱，被认为是纳米复合薄膜与C60和富勒烯晶体纳米颗粒嵌入在非晶sp2和sp3碳矩阵。薄膜的高硬度和高弹性回复归因于C60和富勒烯纳米晶（软）分散在非晶碳（硬）中形成的网络结构，抑制了位错的迁移，有助于应力松弛，从而提高了薄膜的力学性能。
Hydrogenated amorphous carbon films were deposited by dc-pulse plasma chemical vapor deposition. The structure of as-prepared films, characterized by transmission electron microscopy, Raman spectra, and x-ray photoelectron spectra, is considered as nanocomposite thin films with C60 and fullerene crystalline nanoparticles embedded in amorphous sp2 and sp3 carbon matrices. The high hardness and high elastic recovery of as-prepared films are attributed to the unique structure that C60 and fullerene nanocrystalline grains (soft) dispersed in amorphous carbon phase (hard) to form a network structure, which restrains the dislocation migration, assists the stress relaxation, and hence, enhances the mechanical properties of the films.