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Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-36123

Rao, F; Garrett-Roe, S; Hamm, P (2010). Structural inhomogeneity of water by complex network analysis. Journal of Physical Chemistry. B, 114(47):15598-15604.

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Abstract

There is still an open debate regarding the structure forming capabilities of water at ambient conditions. To probe the presence of such inhomogeneities, we apply complex network analysis methods to a molecular dynamics simulation at room temperature. This study provides both a structural and quantitative characterization of kinetically homogeneous substates present in bulk water. We find that the conformation-space network is highly modular, and that structural properties of water molecules are spatially correlated over at least two solvation shells. From a kinetic point of view, the free energy surface is characterized by multiple heterogeneous metastable regions with different populations and marginal barriers separating them. The typical time scale of hopping between them is 200-400 fs. A scanning in temperature reveals that those substates can be stabilized either entropically or enthalpically. The latter resembles an icelike domain that extends for at least two solvation shells.

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15 citations in Web of Science®
15 citations in Scopus®
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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
DDC:540 Chemistry
Language:English
Date:2010
Deposited On:16 Dec 2010 15:40
Last Modified:05 Jun 2014 13:50
Publisher:American Chemical Society
ISSN:1520-5207
Funders:Swiss National Science Foundation through NCCR-MUST
Additional Information:This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Physical Chemistry. B, copyright © American Chemical Society after peer review and technical editing by the publisher.
Publisher DOI:10.1021/jp1060792
PubMed ID:20857960

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