Work

Nano FTIR spectroscopy of liquid water in the –OH stretching region

Year: 2024

Type: article

Abstract: O, HOD, and aqueous salt solutions can be probed in nano-FTIR spectroscopy. Nano-FTIR absorption and phase spectra have been acquired at different harmonics and it was found the third optical harmonic (O3) in the nano-FTIR absorption spectra exhibited the highest resemblance with attenuated total reflection (ATR). Being able to probe water stretching vibrations with nano-FTIR spectroscopy is of importance since the stretching vibrations contain considerably more detailed information regarding for example hydrogen bonding strength than the bending vibration. In addition, it enables studies of the essential interactions between water and biomolecules. Furthermore, this work highlights both advantages and challenges that nano-FTIR spectroscopy in a liquid sample cell has and importance of further studies that lead to a better understanding of the near-field signals in liquids.

Source: Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy

DOI: 10.1016/j.saa.2024.125640

Authors: Nikolay Kotov, Markus M. Keskitalo, C. Magnus Johnson

Institution: KTH Royal Institute of Technology

Language: English

Topic: Spectroscopy and Quantum Chemical Studies

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,470

Funders: Stiftelsen Olle Engkvist Byggmästare, Ludwig-Maximilians-Universität München