Hydration Dynamics at Femtosecond Time Scales and Angstrom Length Scales from Inelastic X-Ray Scattering

Robert H. Coridan, Nathan W. Schmidt, Ghee Hwee Lai, Rahul Godawat, Michael Krisch, Shekhar Garde, Peter Abbamonte, and Gerard C. L. Wong
Phys. Rev. Lett. 103, 237402 – Published 3 December 2009

Abstract

We use high resolution dynamical structure factor S(q,ω) data measured with inelastic x-ray scattering to reconstruct the Green’s function of water, which describes its density response to a point charge, and provides a fundamental comparative model for solvation behavior at molecular time scales and length scales. Good agreement is found with simulations, scattering and spectroscopic experiments. These results suggest that a moving point charge will modify its hydration structure, evolving from a spherical closed shell to a steady-state cylindrical hydration “sleeve”.

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  • Received 13 April 2009

DOI:https://doi.org/10.1103/PhysRevLett.103.237402

©2009 American Physical Society

Authors & Affiliations

Robert H. Coridan1,†, Nathan W. Schmidt1,†, Ghee Hwee Lai1,†, Rahul Godawat2, Michael Krisch3, Shekhar Garde2, Peter Abbamonte1, and Gerard C. L. Wong1,4,*,†

  • 1Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
  • 2Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, USA
  • 3European Synchrotron Radiation Facility, Grenoble Cedex, France
  • 4Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA

  • *Corresponding author: gclwong@illinois.edu
  • Present address: Department of Bioengineering, CNSI, UCLA, Los Angeles, CA 90095.

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Issue

Vol. 103, Iss. 23 — 4 December 2009

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