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Femtosecond dynamics of microscopic friction: nature of coherent versus diffusive motion from gas to liquid density

Baskin, J. S. and Gupta, M. and Chachisvilis, M. and Zewail, A. H. (1997) Femtosecond dynamics of microscopic friction: nature of coherent versus diffusive motion from gas to liquid density. Chemical Physics Letters, 275 (5-6). pp. 437-444. ISSN 0009-2614. https://resolver.caltech.edu/CaltechAUTHORS:20160824-074503616

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Abstract

With femtosecond resolution, we have observed in real time the progressive effect of solvent friction on rotational motion for a well-defined solute in solvents from gas to liquid densities. A quantitative model, J-coherence, of the microscopic interaction of solvent and solute, based on binary-collision angular-momentum transfer, has been used over the entire density range to describe microscopic friction. The limiting behavior at high density of the friction coefficient is compared with the prediction of the stochastic Langevin equation and with the continuum hydrodynamic model. The clear resolution of the coherent, inertial and diffusive motion allows for a description of the transition from the gas to liquid density regime at the molecular level.


Item Type:Article
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URLURL TypeDescription
http://dx.doi.org/10.1016/S0009-2614(97)00802-6DOIArticle
http://www.sciencedirect.com/science/article/pii/S0009261497008026PublisherArticle
Additional Information:© 1997 Elsevier B.V. Received 23 June 1997; in final form 10 July 1997. This work was supported by a grant from the National Science Foundation. MC thanks the Swedish Foundation for International Cooperation in Research and Higher Education for its generous fellowship.
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NSFUNSPECIFIED
Swedish Foundation for International Cooperation in Research and Higher Education (STINT)UNSPECIFIED
Issue or Number:5-6
Record Number:CaltechAUTHORS:20160824-074503616
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20160824-074503616
Official Citation:J.S. Baskin, M. Gupta, M. Chachisvilis, A.H. Zewail, Femtosecond dynamics of microscopic friction: nature of coherent versus diffusive motion from gas to liquid density, Chemical Physics Letters, Volume 275, Issues 5–6, 5 September 1997, Pages 437-444, ISSN 0009-2614, http://dx.doi.org/10.1016/S0009-2614(97)00802-6. (http://www.sciencedirect.com/science/article/pii/S0009261497008026)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:69875
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:26 Aug 2016 17:28
Last Modified:03 Oct 2019 10:26

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