PhysRevLett.98.077801.pdf (522.88 kB)
Observation of fractional Stokes-Einstein behavior in the simplest hydrogen-bonded liquid
journal contribution
posted on 2023-06-07, 22:12 authored by F Fernandez-Alonso, F J Bermejo, S E McLain, John TurnerJohn Turner, J J Molaison, K W HerwigQuasielastic neutron scattering has been used to investigate the single-particle dynamics of hydrogen fluoride across its entire liquid range at ambient pressure. For T>230¿¿K, translational diffusion obeys the celebrated Stokes-Einstein relation, in agreement with nuclear magnetic resonance studies. At lower temperatures, we find significant deviations from the above behavior in the form of a power law with exponent ¿=-0.71±0.05. More striking than the above is a complete breakdown of the Debye-Stokes-Einstein relation for rotational diffusion. Our findings provide the first experimental verification of fractional Stokes-Einstein behavior in a hydrogen-bonded liquid, in agreement with recent computer simulations
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Journal
Physical Review LettersISSN
0031-9007External DOI
Issue
7Volume
98Page range
077801/1-077801/4Pages
4.0Department affiliated with
- Chemistry Publications
Notes
This paper details the first observation of deviation from Stokes-Einstein behaviour in a hydrogen bonded liquid, using quasielastic neutron scattering. International collaboration between JFCT and FJB. JFCT directed the experimental work.Full text available
- Yes
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Legacy Posted Date
2012-02-06First Open Access (FOA) Date
2016-03-22First Compliant Deposit (FCD) Date
2016-08-17Usage metrics
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