The Nucleation Process in the Preparation of Graphene Films by Pulsed Laser Deposition
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2018年第2期
论文作者：王进 WANG Xuemin YU Jian XIAO Tingting PENG Liping XIONG Zhengwei CAO Linhong WANG Chuanbin 沈强
文章页码：343 - 348
摘 要：The nucleation process of graphene films prepared by pulsed laser deposition has been investigated in detail. It is found that graphene nucleates at the steps on the substrate surface firstly, from aggregation of nuclei into particles. High pulsed laser energy offers large incident energy for carbon particles deposited on the surface of the substrate, which is beneficial to the nucleation of graphene. A lot of steps are formed on the copper substrate due to the high temperature, so that the high incident energetic carbon species are able to form a stable nucleus at the steps. As the incident particles increases, the graphene nuclei are combined to grow together. Further, it is found that graphene tends to form few layer graphene particles instead of large graphene sheets.
王进1,2，WANG Xuemin2，YU Jian2，XIAO Tingting2，PENG Liping2，XIONG Zhengwei3，CAO Linhong4,3，WANG Chuanbin1，沈强1
1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology2. Research Center of Laser Fusion,China Academy of Engineering Physics3. Laboratory for Extreme Conditions Matter Properties,Southwest University of Science and Technology4. School of Materials Science and Engineering,Southwest University of Science and Technology
摘 要：The nucleation process of graphene films prepared by pulsed laser deposition has been investigated in detail. It is found that graphene nucleates at the steps on the substrate surface firstly, from aggregation of nuclei into particles. High pulsed laser energy offers large incident energy for carbon particles deposited on the surface of the substrate, which is beneficial to the nucleation of graphene. A lot of steps are formed on the copper substrate due to the high temperature, so that the high incident energetic carbon species are able to form a stable nucleus at the steps. As the incident particles increases, the graphene nuclei are combined to grow together. Further, it is found that graphene tends to form few layer graphene particles instead of large graphene sheets.
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