Water orientation at hydrophobic interfaces.
We study the structure and orientation of water molecules at water/alkane and water/polydimethylsiloxane interfaces with surface specific intensity and heterodyne-detected vibrational sum-frequency generation (HD-VSFG) spectroscopy. We observe that the hydrogen-bond structure of the water molecules is enhanced at these interfaces compared to the water/air interface. We also find that the water molecules at the interface show a net orientation of their O-H groups pointing towards to the hydrophobic layer.
FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
Simona
S
Strazdaite
FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
Jan
J
Versluis
FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
Huib J
HJ
Bakker