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摘要: 报道了一种用高序石墨在乙醇、水或乙醇水混合溶液中超声波处理产生的碳样品.高分辨率电子显微镜揭示出大量具有总角度为θ0(±30℃)倍数的弯曲石墨片存在.显微镜检查表明,弯曲是通过原子晶格平面的偏转而成的.基于石墨的对称轴结构和在sp2石墨网络中类-sp3线缺陷的形成,讨论了石墨片弯曲的可能解释.
Abstract: Here we report a carbon sample generated by sonicating high oriented pyrolytic graphite (HOPG) in ethanol, water or ethanol-water mixed solution. High resolution transmission electron microscopy (HRTEM) revealed many multilayer graphite sheets with a total curved angle that is multiples of θ0(=30°). Close examination of the micrographs showed that the curvature is accomplished by bending the lattice planes. A possible explanation for the curvature in multilayer graphite sheets is discussed based on the conformation of graphite symmetry axes and the formation of sp3-like line defects in the sp2 graphitic network.