石墨烯
材料科学
单色仪
膜
晶体缺陷
透射电子显微镜
六边形晶格
分子物理学
格子(音乐)
纳米技术
拓扑缺陷
凝聚态物理
化学物理
光电子学
物理
化学
生物化学
反铁磁性
声学
波长
作者
Jannik C. Meyer,C. Kisielowski,Rolf Erni,Marta D. Rossell,Michael F. Crommie,A. Zettl
出处
期刊:Nano Letters
[American Chemical Society]
日期:2008-06-19
卷期号:8 (11): 3582-3586
被引量:1086
摘要
We present a transmission electron microscopy investigation of graphene membranes, crystalline foils with a thickness of only 1 atom. By using aberration-correction in combination with a monochromator, 1-A resolution is achieved at an acceleration voltage of only 80 kV. The low voltage is crucial for the stability of these membranes. As a result, every individual carbon atom in the field of view is detected and resolved. We observe a highly crystalline lattice along with occasional point defects. The formation and annealing of Stone-Wales defects is observed in situ. Multiple five- and seven-membered rings appear exclusively in combinations that avoid dislocations and disclinations, in contrast to previous observations on highly curved (tube- or fullerene-like) graphene surfaces.
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