High pressure transformation of graphene nanoplates: A Raman study

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• 作者：Shuangchen Lu ; Mingguang Yao ; Xigui Yang ; Quanjun Li ; Junping Xiao ; Zhen Yao ; Linhai Jiang ; Ran Liu ; Bo Liu ; Shuanglong Chen ; Bo Zou ; Tian Cui ; Bingbing Liu
• 刊名：Chemical Physics Letters
• 出版年：2013
• 出版时间：14 October, 2013
• 年：2013
• 卷：585
• 期：Complete
• 页码：101-106
• 全文大小：1489 K

文摘

High pressure Raman study on graphene nanoplates, graphite and micro-graphite has been carried out in a diamond anvil cell. A phase transformation has been observed in graphene nanoplates at 15 GPa in the experiments with or without pressure medium, which can be explained by the interlayer coupling with sp³ bonds formed in the material. For graphite and micro-graphite, the transition pressure is 19 GPa. Different transition pressures for them are attributed to the thickness difference. The lower transition pressure in graphene nanoplates has been discussed in the framework of the special limited-number layer structure and nucleation process in phase transition.