Controllable preparation of vertically standing graphene sheets and their wettability and supercapacitive properties
Zhou Hai-Tao1, Yu Ning2, Zou Fei1, Yao Zhao-Hui2, Gao Ge1, Shen Cheng-Min3, †, 
(a) Pristine VSG is hydrophobic with a CA of 140.1°. (b) After O2-plasma treatment, VSG converts to be hydrophilic with a CA of 0°. (c) After subsequently H2-plasma treatment, VSG recovers to be hydrophobic with a CA of 133.0°. (d) SEM image of VSG after oxidation treatment. The well preserved sheet structure indicates that VSG has not been damaged during the plasma treatment.
