DOI: 10.1063/1.470932. Measuring diffusion in supercooled liquids: The effect of kinetic inhomogeneities

Measuring diffusion in supercooled liquids: The effect of kinetic inhomogeneities

10.1063/1.470932

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

There is growing evidence to suggest that cooperativity in glasses is characterized by a spatial distribution of relaxation times. In this paper we examine the consequences of such inhomogeneities in the measurement of translational and rotational diffusion constants. We find that the decay of a concentration profile (the basis of transient grating experiments) is accelerated by the development of additional gradients parallel to the relaxation time gradients. This may account for recently observed differences in the variation of rotational and translational diffusion constants with viscosity below the glass transition temperature. The additional gradients may also provide the first direct means of examining the length scale associated with these inhomogeneities.

Bibliography

Perera, D. N., & Harrowell, P. (1996). Measuring diffusion in supercooled liquids: The effect of kinetic inhomogeneities. The Journal of Chemical Physics, 104(6), 2369â2375.

Authors 2

Donna N. Perera (first)
Peter Harrowell (additional)

References 23 Referenced 22

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Dates

Type	When
Created	23 years ago (July 26, 2002, 8:15 a.m.)
Deposited	1 year, 6 months ago (Feb. 7, 2024, 3:04 p.m.)
Indexed	1 year, 6 months ago (Feb. 7, 2024, 3:40 p.m.)
Issued	29 years, 6 months ago (Feb. 8, 1996)
Published	29 years, 6 months ago (Feb. 8, 1996)
Published Print	29 years, 6 months ago (Feb. 8, 1996)

Funders 0

None

BibTeX

@article{Perera_1996, title={Measuring diffusion in supercooled liquids: The effect of kinetic inhomogeneities}, volume={104}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.470932}, DOI={10.1063/1.470932}, number={6}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Perera, Donna N. and Harrowell, Peter}, year={1996}, month=feb, pages={2369–2375} }

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