Nanoscale dynamics of water confined in ordered mesoporous carbon
Name
c8cp07704e.pdf
Description
Published version
Size
4 MB
Format
Adobe PDF
Checksum (MD5)
50ba63d8524968432c6369cdd2749dbe
Author(s)
Ito, Kanae
Faraone, Antonio
Tyagi, Madhusudan
Yamaguchi, Toshio
Chen, Sow-Hsin
Date Issued
April 2019
Journal
Physical Chemistry Chemical Physics
Publisher
Royal Society of Chemistry
Citation
Ito, Kanae, et al. "Nanoscale dynamics of water confined in ordered mesoporous carbon." Physical Chemistry Chemical Physics 21, 16 (April 2019): 8517-8528 ©2019 Author(s)
Version
Final published version
Abstract
The single particle dynamics of water confined within two ordered mesoporous carbon matrices was investigated in the temperature range from 290 K to 170 K by quasielastic neutron scattering using three high resolution neutron spectrometers. Thus, it was possible to investigate the mobility of water confined in model hydrophobic cavities at the nanoscale. Models developed for the nanoscale dynamics of supercooled water and water confined within hydrophilic matrices were able to describe the collected data but remarkable differences with analogous silica confined matrices were observed in these carbon samples. A significant fraction of the water molecules was immobile on the nanosecond timescale, even at room temperature. As the temperature was lowered, the mobility of the water molecules slowed down, but the strongly non-Arrhenius behavior observed in bulk water and for fully hydrated hydrophilic confinement was absent, which indicates frustration of the hydrogen bond network formation. The obtained results were relevant for applications of mesoporous carbon materials.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Terms of Use
Creative Commons Attribution Noncommercial 3.0 unported license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1039/c8cp07704e
