title: Interfacial nanobubbles on atomically flat substrates with different hydrophobicities.
abstract: The dependence of the morphology of interfacial nanobubbles on atomically flat substrates with different wettability ranges was investigated by using PeakForce quantitative nanomechanics. Interfacial nanobubbles were formed and imaged on silicon nitride (Si3N4), mica, and highly ordered pyrolytic graphite (HOPG) substrates that were partly covered by reduced graphene oxide (rGO). The contact angles and sizes of those nanobubbles were measured under the same conditions. Nanobubbles with the same lateral width exhibited different heights on the different substrates, with the order Si3N4≈mica>rGO>HOPG, which is consistent with the trend of the hydrophobicity of the substrates.
authors.affiliation: Department of Physics, Ningbo University, Ningbo, 315211 (PR China); Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800 (PR China); Shanghai Synchrotron Radiation Facility, Shanghai 201204 (PR China).
authors.forename: Xingya
authors.initials: X
authors.lastname: Wang
authors.forename: Binyu
authors.initials: B
authors.lastname: Zhao
authors.forename: Wangguo
authors.initials: W
authors.lastname: Ma
authors.forename: Ying
authors.initials: Y
authors.lastname: Wang
authors.forename: Xingyu
authors.initials: X
authors.lastname: Gao
authors.forename: Renzhong
authors.initials: R
authors.lastname: Tai
authors.forename: Xingfei
authors.initials: X
authors.lastname: Zhou
authors.forename: Lijuan
authors.initials: L
authors.lastname: Zhang
keywords: atomic force microscopy; hydrophobicity; interfacial nanobubbles; reduced graphene oxide; substrate