Picosecond self-diffusion in ethanol-water mixtures

Tilo Seydel, Robert M. Edkins, Katharina Edkins

Research output: Contribution to journalArticle

Abstract

We report the self-diffusion in ethanol-water mixtures as a function of the water-ethanol ratio measured at different temperatures using quasi-elastic neutron spectroscopy (QENS). For our protiated samples, QENS is mainly sensitive to the dominant ensemble averaged incoherent scattering from the hydrogen atoms of the liquid mixtures. The energy range and resolution render our experiment sensitive to the picosecond time scale and nanometer length scale. These observation scales complement different scales accessible by nuclear magnetic resonance techniques. Subsequent to testing different models, we find that a simple jump diffusion model averaging over both types of molecules, water and ethanol, best fits our data.
LanguageEnglish
Pages9547-9552
Number of pages6
JournalPhysical Chemistry Chemical Physics
Volume21
Issue number18
Early online date16 Apr 2019
DOIs
Publication statusPublished - 16 Apr 2019

Fingerprint

ethyl alcohol
Ethanol
Water
Neutrons
Spectroscopy
Incoherent scattering
water
neutrons
incoherent scattering
Hydrogen
Nuclear magnetic resonance
complement
spectroscopy
hydrogen atoms
Atoms
Molecules
Liquids
Testing
nuclear magnetic resonance
liquids

Keywords

  • quasi-elastic neutron scattering (QENS)
  • aqueous ethanol mixtures
  • ethanol
  • ethanol and water

Cite this

Seydel, Tilo ; Edkins, Robert M. ; Edkins, Katharina. / Picosecond self-diffusion in ethanol-water mixtures. In: Physical Chemistry Chemical Physics. 2019 ; Vol. 21, No. 18. pp. 9547-9552.
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Picosecond self-diffusion in ethanol-water mixtures. / Seydel, Tilo; Edkins, Robert M.; Edkins, Katharina.

In: Physical Chemistry Chemical Physics, Vol. 21, No. 18, 16.04.2019, p. 9547-9552.

Research output: Contribution to journalArticle

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