Enhanced ordering of water at hydrophobic surfaces

Simona Strazdaite; Jan Versluis; Ellen H G Backus; Huib J Bakker

doi:10.1063/1.4863558

Enhanced ordering of water at hydrophobic surfaces

J Chem Phys. 2014 Feb 7;140(5):054711. doi: 10.1063/1.4863558.

Authors

Simona Strazdaite¹, Jan Versluis¹, Ellen H G Backus¹, Huib J Bakker¹

Affiliation

¹ FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.

PMID: 24511972
DOI: 10.1063/1.4863558

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.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Dimethylpolysiloxanes / chemistry
Hydrophobic and Hydrophilic Interactions*
Temperature
Vibration
Water / chemistry*

Substances

Dimethylpolysiloxanes
Water