title: No ice-like water at aqueous biological interfaces.
abstract: The surface vibrational spectrum of water at biological interfaces is often interpreted as having 'ice-like' and 'liquid-like' components. Here we show that the vibrational spectrum of water at both water-lipid and water-protein interfaces greatly simplifies upon H/D isotopic dilution, which is inconsistent with the presence of 'ice-like' structures. The changes in the spectra as a function of isotope content can be explained by intramolecular coupling between bend and stretch vibrations of the water molecules.
authors.affiliation: Max-Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany. bonn@mpip-mainz.mpg.de
authors.forename: Mischa
authors.initials: M
authors.lastname: Bonn
authors.forename: Huib J
authors.initials: HJ
authors.lastname: Bakker
authors.forename: Yujin
authors.initials: Y
authors.lastname: Tong
authors.forename: Ellen H G
authors.initials: EH
authors.lastname: Backus
mesh_terms: D050356:Lipid Metabolism; D008055:Lipids / Q000737:chemistry*; D011506:Proteins / Q000737:chemistry* / Q000378:metabolism*; D013057:Spectrum Analysis; D014867:Water / Q000737:chemistry* / Q000378:metabolism*
chemical_list: D008055:Lipids; D011506:Proteins; D014867:Water