Related Experiment Video
Updated: Jun 25, 2026

Multimodal Nonlinear Hyperspectral Chemical Imaging Using Line-Scanning Vibrational Sum-Frequency Generation Microscopy
Published on: December 1, 2023
Isotopic dilution study of the water/vapor interface by phase-sensitive sum-frequency vibrational spectroscopy
1Physics Department, University of California at Berkeley, Berkeley, California 94720, USA.
Abstract:
Phase-sensitive sum-frequency vibrational spectroscopy (PS-SFVS) has been used to probe the isotopically diluted water/vapor interfaces in the spectral regions of OD (2200-2800 cm(-1)) and OH (3000-3800 cm(-1)) stretches. The experimentally measured Im chiS(2) spectra, where chiS(2) is the surface nonlinear susceptibility, permit direct characterization of resonances of the interfaces. The Im chiS(2) spectrum of the HDO/vapor interface that is intrinsically simpler to analyze can be deduced from the result of isotopic dilution. It exhibits in the bonded-OH region a broad band comprising two parts with opposite signs, in contrast to those deduced earlier from fitting of the |chiS(2)|2 spectra and those calculated by MD simulation, but consistent with that obtained for the H2O/vapor interface.
Related Concept Videos
Atomic Absorption Spectroscopy: Atomization Methods
Volatilization
¹H NMR of Labile Protons: Deuterium (²H) Substitution
IR Spectrum Peak Broadening: Hydrogen Bonding
However, the extent of hydrogen bonding influences the observed stretching frequency and band broadening. Intermolecular or intramolecular hydrogen bonding...
NMR Spectroscopy: Chemical Shift Overview
For instance, the proton...
Mass Spectrometry: Isotope Effect
