Du Q, Freysz E, Shen YR. Surface Vibrational Spectroscopic Studies of Hydrogen Bonding and Hydrophobicity.
Science 1994;
264:826-8. [PMID:
17794723 DOI:
10.1126/science.264.5160.826]
[Citation(s) in RCA: 505] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Surface vibrational spectroscopy by sum-frequency generation was used to study hydrophobicity at the molecular level at various interfaces: water-surfactant-coated quartz, water-hexane, and water-air. In all cases, hydrophobicity was characterized by the appearance of dangling hydroxyl bonds on 25 percent of the surface water molecules. At the water-quartz interface, packing restrictions force the water surface layer to have a more ordered, ice-like structure. A partly wettable water-quartz interface was also studied.
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