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    Interfacial Nanobubbles on Atomically Flat Substrates with Different Hydrophobicities

    Year: 2015

    Journal: CHEMPHYSCHEM, Vol. 16, p 1003-1007, 20170208

    Authors: Wang, Xingya; Zhao, Binyu; Ma, Wangguo; Wang, Ying; Gao, Xingyu; Tai, Renzhong; Zhou, Xingfei; Zhang, Lijuan

    Organizations: Ningbo Univ, Dept Phys, Ningbo 315211, Zhejiang, Peoples R China; Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China; Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China; Chinese Acad Sci, Key Lab Interfacial Phys & Technol, Shanghai 201800, Peoples R China; Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China

    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 approximate to mica>rGO>HOPG, which is consistent with the trend of the hydrophobicity of the substrates.