Wettability of graphene

The discovery of graphene has renewed the interest in the wettability of graphitic materials. Although graphene and graphite are long believed to be hydrophobic, recent studies have challenged this long-held belief. In addition, the unique structure of graphene also enabled new avenues to manipulate their wetting properties. This review highlights recent studies in these research areas with a special focus on the following topics: (1) intrinsic wettability of graphene; (2) manipulate the wettability of graphene by surface engineering; (3) theoretical studies of water-graphene interaction; and (4) cleaning of graphene.