Picosecond self-diffusion in ethanol-water mixtures

Seydel, Tilo and Edkins, Robert M. and Edkins, Katharina (2019) Picosecond self-diffusion in ethanol-water mixtures. Physical Chemistry Chemical Physics, 21 (18). pp. 9547-9552. ISSN 1463-9076 (https://doi.org/10.1039/C9CP01982K)

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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.

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• Item metadata

  Item type:	Article
  ID code:	67611
  Dates:	Date Event 16 April 2019 Published 16 April 2019 Published Online 15 April 2019 Accepted
  Subjects:	Science > Chemistry
  Department:	Faculty of Science > Pure and Applied Chemistry Faculty of Science > Strathclyde Institute of Pharmacy and Biomedical Sciences
  Depositing user:	Pure Administrator
  Date deposited:	18 Apr 2019 11:52
  Last modified:	26 Apr 2024 00:34
  URI:	https://strathprints.strath.ac.uk/id/eprint/67611