Surface Water as a Mediator and Reporter of Adhesion at Aqueous Interfaces

Accounts of Chemical Research
Tasha A JariszDennis K Hore

Abstract

Understanding the adsorption of molecules onto surfaces is integral to a wide variety of fields with scientific, engineering, and industrial applications. The surface-adsorbed structure is governed by the nature of the molecule, surface characteristics, and solution environment. There are therefore three critical interactions that govern adhesion: solvent-analyte, substrate-analyte, and substrate-solvent. The last two interactions require a surface-specific probe restricted to a few nanometers or less. This is particularly true of efforts to probe polymer surface structure without being overwhelmed by bulk polymer signal or interfacial water structure in the presence of bulk water. Second-order nonlinear optical techniques are ideal probes of such interactions, as their reporting depth is determined by the polar arrangement of molecules (a break in the macroscopic inversion symmetry) rather than the penetration of the optical fields. This Account begins with an introduction of surface water structure from the perspective of a nonlinear probe. Details about the unique view of the water orientation distribution are discussed and contrasted with information obtained from conventional vibrational techniques. The salient features of...Continue Reading

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Citations

Mar 15, 2020·Annual Review of Chemical and Biomolecular Engineering·Jacob MonroeM Scott Shell

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