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홍성주,박민,강호진,이민우,David Soler Delgado,정대홍,박영우,김병훈 한국물리학회 2016 Current Applied Physics Vol.16 No.12
We report hydrogen adsorption on twisted bilayer graphene (tBLG). Raman spectroscopy and the electrical transport properties (electrical resistance and thermoelectric power) confirm the electron doping by hydrogen adsorption, in agreement with the previous report involving exfoliated bilayer graphene (BLG). Common electron doping behaviors were observed at various twist angles (0, 5, 12.5, and 30), and the adsorptions follow the first-order Langmuir-type adsorption model. Specifically, we analyzed the off-state currents, with band-gap openings of around 13 meV in tBLG with twist angle of 0, as in Bernalstacked BLG.