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Title: Quasielastic neutron scattering study of water confined in carbon nanopores

Abstract

Microscopic dynamics of water confined in nanometer and sub-nanometer pores of carbide-derived carbon (CDC) were investigated using quasielastic neutron scattering (QENS). The temperature dependence of the average relaxation time, ‹τ›, exhibits super-Arrhenius behavior that could be described by Vogel-Fulcher-Tammann (VFT) law in the range from 250 K to 190 K; below this temperature, ‹τ› follows Arrhenius temperature dependence. The temperature of the dynamic crossover between the two regimes in water confined in the CDC pores is similar to that observed for water in hydrophobic confinement of the larger size, such as 14 Å ordered mesoporous carbon (CMK) and 16 Å double-wall carbon nanotubes. Thus, the dynamical behavior of water remains qualitatively unchanged even in the very small hydrophobic pores.

Authors:
 [1];  [1];  [1];  [2];  [3]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Scattering Science Division
  2. Drexel Univ., Philadelphia, PA (United States). Dept. of Materials Science and Engineering
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Sciences Division
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC); Fluid Interface Reactions, Structures and Transport Center (FIRST)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1065759
DOE Contract Number:  
DOE-ERKCC61
Resource Type:
Journal Article
Journal Name:
Europhysics Letters
Additional Journal Information:
Journal Volume: 95; Journal Issue: 5; Related Information: FIRST partners with Oak Ridge National Laboratory (lead); Argonne National Laboratory; Drexel University; Georgia State University; Northwestern University; Pennsylvania State University; Suffolk University; Vanderbilt University; University of Virginia; Journal ID: ISSN 0295-5075
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY; catalysis (heterogeneous), solar (fuels), energy storage (including batteries and capacitors), hydrogen and fuel cells, electrodes - solar, mechanical behavior, charge transport, materials and chemistry by design, synthesis (novel materials)

Citation Formats

Chathoth, S. M., Mamontov, E., Kolesnikov, A. I., Gogotsi, Y., and Wesolowski, D. J. Quasielastic neutron scattering study of water confined in carbon nanopores. United States: N. p., 2011. Web. doi:10.1209/0295-5075/95/56001.
Chathoth, S. M., Mamontov, E., Kolesnikov, A. I., Gogotsi, Y., & Wesolowski, D. J. Quasielastic neutron scattering study of water confined in carbon nanopores. United States. doi:10.1209/0295-5075/95/56001.
Chathoth, S. M., Mamontov, E., Kolesnikov, A. I., Gogotsi, Y., and Wesolowski, D. J. Tue . "Quasielastic neutron scattering study of water confined in carbon nanopores". United States. doi:10.1209/0295-5075/95/56001.
@article{osti_1065759,
title = {Quasielastic neutron scattering study of water confined in carbon nanopores},
author = {Chathoth, S. M. and Mamontov, E. and Kolesnikov, A. I. and Gogotsi, Y. and Wesolowski, D. J.},
abstractNote = {Microscopic dynamics of water confined in nanometer and sub-nanometer pores of carbide-derived carbon (CDC) were investigated using quasielastic neutron scattering (QENS). The temperature dependence of the average relaxation time, ‹τ›, exhibits super-Arrhenius behavior that could be described by Vogel-Fulcher-Tammann (VFT) law in the range from 250 K to 190 K; below this temperature, ‹τ› follows Arrhenius temperature dependence. The temperature of the dynamic crossover between the two regimes in water confined in the CDC pores is similar to that observed for water in hydrophobic confinement of the larger size, such as 14 Å ordered mesoporous carbon (CMK) and 16 Å double-wall carbon nanotubes. Thus, the dynamical behavior of water remains qualitatively unchanged even in the very small hydrophobic pores.},
doi = {10.1209/0295-5075/95/56001},
journal = {Europhysics Letters},
issn = {0295-5075},
number = 5,
volume = 95,
place = {United States},
year = {2011},
month = {7}
}