Momentum-dependent sum-frequency vibrational spectroscopy of bonded interface layer at charged water interfaces.

ABSTRACT: Interface-specific hydrogen (H)-bonding network of water directly controls the energy transfer and chemical reaction pathway at many charged aqueous interfaces, yet to characterize these bonded water layer structures remains a challenge. We now develop a sum-frequency spectroscopic scheme with varying photon momenta as an all-optic solution for retrieving the vibrational spectra of the bonded water layer and the ion diffuse layer and, hence, microscopic structural and charging information about an interface. Application of the method to a model surfactant-water interface reveals a hidden weakly donor H-bonded water species, suggesting an asymmetric hydration-shell structure of fully solvated surfactant headgroups. In another application to a zwitterionic phosphatidylcholine lipid monolayer

SUBMITTER: Hsiao Y 

PROVIDER: S-EPMC10096568 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature