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Zeitschrift für Physikalische Chemie

International journal of research in physical chemistry and chemical physics

Editor-in-Chief: Rademann, Klaus

12 Issues per year


IMPACT FACTOR 2016: 1.012

CiteScore 2016: 0.99

SCImago Journal Rank (SJR) 2016: 0.463
Source Normalized Impact per Paper (SNIP) 2016: 0.470

Online
ISSN
2196-7156
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Volume 224, Issue 1-2

Issues

The Dynamic Response Function χT(Q,t) of Confined Supercooled Water and its Relation to the Dynamic Crossover Phenomenon

Sow-Hsin Chen / Yang Zhang / Marco Lagi / X. Chu / Li Liu / Antonio Faraone / Emiliano Fratini / Piero Baglioni
Published Online: 2010-04-19 | DOI: https://doi.org/10.1524/zpch.2010.6095

Abstract

We have made a series of Quasi-Elastic Neutron Scattering (QENS) studies of supercooled water confined in 3-D and 1-D geometries, specifically, interstitial water in aged cement paste (3-D) and water confined in MCM-41-S and Double Wall Nano Tube DWNT (1-D). In addition, we also include the cases of hydration water on protein surface and other biopolymer surfaces (pseudo 2-D). By analyzing the QENS spectra using Relaxing Cage Model (RCM), we are able to extract accurately the self-intermediate scattering function of hydrogen atoms FH(Q,t), at low-Q as a function of temperature T, showing an α-relaxation process at long time. We can then construct the Dynamic Response Function χT(Q,t) = -dFH(Q,t)/dT. χT(Q,t) as a function of t at constant Q shows a single peak at the characteristic α-relaxation time 〈τ〉, the amplitude of which grows as we approach the dynamic crossover temperature TL observed before in each of these geometries. However, the peak height of χT(Q,t) decreases after passing the crossover temperature TL. We make an argument to relate the occurrence of the extremum of the peak height in χT to the existence of the dynamic crossover temperature in each of these cases.

Keywords: Dynamic Response Function; Confined Supercooled Water; Dynamic Crossover Phenomenon

About the article

* Correspondence address: Massachusetts Institute of Technology, Department of Nuclear Science and Engineering, CambridgeMA 02139, U.S.A.,


Published Online: 2010-04-19

Published in Print: 2010-02-01


Citation Information: Zeitschrift für Physikalische Chemie, Volume 224, Issue 1-2, Pages 109–131, ISSN (Online) 2196-7156, ISSN (Print) 0942-9352, DOI: https://doi.org/10.1524/zpch.2010.6095.

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Citing Articles

Here you can find all Crossref-listed publications in which this article is cited. If you would like to receive automatic email messages as soon as this article is cited in other publications, simply activate the “Citation Alert” on the top of this page.

[1]
Christopher E. Bertrand, Yang Zhang, and Sow-Hsin Chen
Phys. Chem. Chem. Phys., 2013, Volume 15, Number 3, Page 721
[2]
Yang Zhang, Madhusudan Tyagi, Eugene Mamontov, and Sow-Hsin Chen
Journal of Physics: Condensed Matter, 2012, Volume 24, Number 6, Page 064112

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