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Updated: Jun 1, 2026

Probing the Structure and Dynamics of Interfacial Water with Scanning Tunneling Microscopy and Spectroscopy
Published on: May 27, 2018
A unique vibrational signature of rotated water monolayers on Pt(111): predicted and observed
Peter J Feibelman1, Greg A Kimmel, R Scott Smith
1Sandia National Laboratories, Albuquerque, New Mexico 87185-1415, USA. pjfeibe@sandia.gov
Abstract:
Six H-bonds in the periodic di-interstitial structure that accounts for scanning tunneling microscope images of "√37" and "√39" wetting layers on Pt(111) are some 0.2 Å shorter than H-bonds are in ice Ih. According to a broadly obeyed correlation, this density functional theory result implies a stringent test of the di-interstitial motif, namely the presence of an OH-stretch band red-shifted from that of ice Ih by more than 1000 cm(-1). Infrared absorption spectra satisfy the test, in showing a feature centered at about 1965 cm(-1), which grows in as deposited water orders.
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