Subnanometer Vacancy Defects Introduced on Graphene by Oxygen Gas Yamada, Yasuhiro ; Murota, Kazumasa ; Fujita, Ryo ; Kim, Jungpil ; Watanabe, Ayuko ; Nakamura, Masashi ; Sato, Satoshi ; Hata, Kenji ; Ercius, Peter ; Ciston, Jim ; Song, Cheng Yu ; Kim, Kwanpyo ; Regan, William ; Gannett, Will ; Zettl, Alex Abstract Publication: Journal of the American Chemical Society Pub Date: February 2014 DOI: 10.1021/ja4117268 Bibcode: 2014JAChS.136.2232Y