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Updated: Jun 2, 2026

Probing the Structure and Dynamics of Interfacial Water with Scanning Tunneling Microscopy and Spectroscopy
Published on: May 27, 2018
Three-dimensional infrared spectroscopy of isotope-substituted liquid water reveals heterogeneous dynamics
Sean Garrett-Roe1, Fivos Perakis, Francesco Rao
1Institute of Physical Chemistry, University of Zurich, Zurich, Switzerland.
Abstract:
The dynamics of the hydrogen bond network of isotopically substituted liquid water are investigated with a new ultrafast nonlinear vibrational spectroscopy, three-dimensional infrared spectroscopy (3D-IR). The 3D-IR spectroscopy is sensitive to three-point frequency fluctuation correlation functions, and the measurements reveal heterogeneous structural relaxation dynamics. We interpret these results as subensembles of water which do not interconvert on a half picosecond time scale. We connect the experimental results to molecular dynamics (MD) simulations, performing a line shape analysis as well as complex network analysis.
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