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Stacking-Specific Reversible Oxidation of Bilayer Graphene

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Park, Baekwon; Jeong, Gyouil; Lim, Eunhak; Suh, Yeonjoon; Choi, Boogeon; Jeong, Hyeon-Woo; Watanabe, Kenji; Taniguchi, Takashi; Lee, Gil-Ho; Heo, Jiyoung; Hong, Byung Hee; Kim, Zee Hwan

Issue Date
American Chemical Society
Chemistry of Materials, Vol.33 No.4, pp.1249-1256
We report, for the first time, that the oxidation of bilayer graphene (BLG) can be reversibly and stacking-specifically controlled. The infrared (IR) absorption, IR nanoscopy, and Raman spectroscopy measurements on BLG consistently show reversible changes in the spectra and images upon exposure to O-2 and H-2 at elevated temperatures. We also obtain spectroscopic and theoretical evidence that stacking orders of graphene layers have a profound influence on the oxide structures: AB-BLG reacting with singlet and triplet oxygen results in endoperoxides (-C-O-O-C-), whereas AA'-BLG reacting with oxygen generates both the epoxides (singlet, -C-O-C-) and endoperoxides (triplet). We believe that our result provides deeper understanding on the layer-dependent catalytic activities of graphene, which is crucial for the design of high-performance graphene-based catalysts needed for various electrochemical, biological, and environmental applications.
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  • College of Natural Sciences
  • Department of Chemistry
Research Area Nanofabrication and characterization, Nanomaterials Synthesis, Quantum mechanics and molecular dynamics simulation, 나노재료 합성, 나노제조 및 특성화, 양자역학 및 분자역학 시뮬레이션


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