Subnanometer Vacancy Defects Introduced on Graphene by Oxygen Gas
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- 作者：Yasuhiro Yamada ; Kazumasa Murota ; Ryo Fujita ; Jungpil Kim ; Ayuko Watanabe ; Masashi Nakamura ; Satoshi Sato ; Kenji Hata ; Peter Ercius ; Jim Ciston ; Cheng Yu Song ; Kwanpyo Kim ; William Regan ; Will Gannett ; Alex Zettl
- 刊名：Journal of the American Chemical Society
- 出版年：2014
- 出版时间：February 12, 2014
- 年：2014
- 卷：136
- 期：6
- 页码：2232-2235
- 全文大小：305K
- ISSN：1520-5126
文摘
The basal plane of graphene has been known to be less reactive than the edges, but some studies observed vacancies in the basal plane after reaction with oxygen gas. Observation of these vacancies has typically been limited to nanometer-scale resolution using microscopic techniques. This work demonstrates the introduction and observation of subnanometer vacancies in the basal plane of graphene by heat treatment in a flow of oxygen gas at low temperature such as 533 K or lower. High-resolution transmission electron microscopy was used to directly observe vacancy structures, which were compared with image simulations. These proposed structures contain C鈺怬, pyran-like ether, and lactone-like groups.