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Updated: Aug 7, 2026

Probing the Structure and Dynamics of Interfacial Water with Scanning Tunneling Microscopy and Spectroscopy
Published on: May 27, 2018
X-ray absorption spectroscopy study of the hydrogen bond network in the bulk water of aqueous solutions
Lars-Ake Näslund1, David C Edwards, Philippe Wernet
1Fysikum, AlbaNova, Stockholm University, SE-106 91 Stockholm, Sweden.
Abstract:
We utilized X-ray absorption spectroscopy (XAS) and X-ray Raman scattering (XRS) in order to study the ion solvation effect on the bulk hydrogen bonding structure of water. The fine structures in the X-ray absorption spectra are sensitive to the local environment of the probed water molecule related to the hydrogen bond length and angles. By varying the concentration of ions, we can distinguish between contributions from water in the bulk and in the first solvation sphere. We show that the hydrogen bond network in bulk water, in terms of forming and breaking hydrogen bonds as detected by XAS/XRS, remains unchanged, and only the water molecules in the close vicinity to the ions are affected.
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