Enhanced ordering of water at hydrophobic surfaces

Enhanced ordering of water at hydrophobic surfaces

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 inter...

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Veröffentlicht in:The Journal of chemical physics 2014-02, Vol.140 (5), p.054711-054711
Hauptverfasser: Strazdaite, Simona, Versluis, Jan, Backus, Ellen H G, Bakker, Huib J
Format: Artikel
Sprache:eng
Schlagworte:
Bonding strength
Dimethylpolysiloxanes - chemistry
Heptanes
Hydrogen bonds
Hydrophobic and Hydrophilic Interactions
Physics
Polydimethylsiloxane
Temperature
Vibration
Water - chemistry
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Zusammenfassung: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.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.4863558