title: Enhanced ordering of water at hydrophobic surfaces.
abstract: We study the properties of water molecules adjacent to a hydrophobic molecular layer with vibrational sum-frequency generation spectroscopy. We find that the water molecules at D2O/hexane, D2O/heptane, and D2O/polydimethylsiloxane interfaces show an enhanced ordering and stronger hydrogen-bond interactions than the water molecules at a D2O/air interface. With increasing temperature (up to 80 °C) the water structure becomes significantly less ordered and the hydrogen bonds become weaker.
authors: FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
authors: Simona
authors: S
authors: Strazdaite
authors: FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
authors: Jan
authors: J
authors: Versluis
authors: FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
authors: Ellen H G
authors: EH
authors: Backus
authors: FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
authors: Huib J
authors: HJ
authors: Bakker
mesh_terms: D004129:Dimethylpolysiloxanes / Q000737:chemistry; D057927:Hydrophobic and Hydrophilic Interactions; D013696:Temperature; D014732:Vibration; D014867:Water / Q000737:chemistry*
chemical_list: D004129:Dimethylpolysiloxanes; D014867:Water