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石墨层折叠特性的原子力显微镜研究
引用本文:李立新,王煦,张新宇,陈晓波,杨超,刘日平.石墨层折叠特性的原子力显微镜研究[J].材料研究学报,2007,21(3):287-290.
作者姓名:李立新  王煦  张新宇  陈晓波  杨超  刘日平
作者单位:1. 燕山大学亚稳材料制备技术与科学国家重点实验室,秦皇岛,066004;河南理工大学物理化学系,焦作,454000
2. 燕山大学机械工程学院,秦皇岛,066004
3. 燕山大学亚稳材料制备技术与科学国家重点实验室,秦皇岛,066004
基金项目:国家自然科学基金 , 国家重点基础研究发展计划(973计划)
摘    要:使用原子力显微镜的探针对石墨的双原子厚片层进行了撕裂和折叠实验,结果表明:石墨片层只沿特定的方向撕裂和折叠;被折叠的片层在折叠轴处会形成一个未封闭的碳纳米管,即石墨片层的sp2键结构在折叠轴处会形成类sp3的结构缺陷;被折叠的片层可以完全展平到原来的位置或被继续撕成形状相同但尺寸较大的三角形.这说明在外力作用下sp2键结构和类sp3键结构可以自由地相互转化而不被损坏,由此可以解释碳纳米管惊人的可弯性.

关 键 词:材料科学基础学科  原子力显微镜  石墨片层  碳纳米管  类sp3键  折叠和撕裂  石墨层  折叠特性  原子力  显微镜  研究  atomic  force  microscopy  layers  graphite  characteristics  解释  损坏  相互转化  外力作用  三角形  尺寸  形状  位置  完全  结构缺陷  键结构
文章编号:1005-3093(2007)03-0287-04
修稿时间:2006-08-282007-01-29

Folding characteristics of graphite layers studied by atomic force microscopy
LI Lixin,WANG Xu,ZHANG Xinyu,CHEN Xiaobo,YANG Chao,LIU Riping.Folding characteristics of graphite layers studied by atomic force microscopy[J].Chinese Journal of Materials Research,2007,21(3):287-290.
Authors:LI Lixin  WANG Xu  ZHANG Xinyu  CHEN Xiaobo  YANG Chao  LIU Riping
Abstract:A double-layer graphite sheet was torn and folded by the tip of an atomic force microscope. The tearing and folding was found to be along preferential directions of the graphite. The cross-sectional analyses showed that an unzipped carbon nanotube was formed along the folding axis, which means that a spa-like defect was formed along the folding axis. It was also found that the folded sheet could be flattened back to its original position exactly and the torn sheet could be stretched to a larger size but with the same shape, which meant that the carbon-carbon sp^2 bond and carbon-carbon spa-like bond could be transformed reversibly. This can be used to explain the excellent bending ability of carbon nanotubes.
Keywords:foundational discipline in materials science  atomic force microscopy  graphite sheet  carbon nanotube  folding and tearing
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