Orientation and Motion of Water Molecules at Air/Water Interface

Details Orientation and Motion of Water Molecules at Air/Water Interface Orientation and Motion of Water Molecules at Air/Water Interface

2005-08-22

arxiv.org/abs/cond-mat/0508525v1

Chin. J. Chem. Phys., 19, 20-24,2006

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

10.1360/cjcp2006.19(1).20.5

Analysis of SFG vibrational spectra of OH stretching bands in four experimental configurations shows that orientational motion of water molecule at air/water interface is libratory within a limited angular range. This picture is significantly different from the previous conclusion that the interfacial water molecule orientation varies over a broad range within the vibrational relaxation time, the only direct experimental evidence for ultrafast and broad orientational motion of a liquid interface by Wei et al. [Phys. Rev. Lett. 86, 4799, (2001)] using single SFG experimental configuration.

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