Electron transport in biomolecular gaseous and liquid systems: theory, experiment and self-consistent cross-sections

White, R.D., Cocks, D., Boyle, G., Casey, M., Garland, N., Konovalov, D., Philippa, B., Stokes, P., de Urquijo, J., González-Magaña, O., McEachran, R.P., Buckman, S.J., Brunger, M.J., Garcia, G., Dujko, S., and Petrovic, Z.Lj. (2018) Electron transport in biomolecular gaseous and liquid systems: theory, experiment and self-consistent cross-sections. Plasma Sources Science and Technology, 27 (5).

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Abstract

Accurate modelling of electron transport in plasmas, plasma-liquid and plasma-tissue interactions requires (i) the existence of accurate and complete sets of cross-sections, and (ii) an accurate treatment of electron transport in these gaseous and soft-condensed phases. In this study we present progress towards the provision of self-consistent electron-biomolecule cross-section sets representative of tissue, including water and THF, by comparison of calculated transport coefficients with those measured using a pulsed-Townsend swarm experiment. Water–argon mixtures are used to assess the self-consistency of the electron-water vapour cross-section set proposed in de Urquijo et al (2014 J. Chem. Phys. 141 014308). Modelling of electron transport in liquids and soft-condensed matter is considered through appropriate generalisations of Boltzmann’s equation to account for spatial-temporal correlations and screening of the electron potential. The ab initio formalism is applied to electron transport in atomic liquids and compared with available experimental swarm data for these noble liquids. Issues on the applicability of the ab initio formalism for krypton are discussed and addressed through consideration of the background energy of the electron in liquid krypton. The presence of self-trapping (into bubble/cluster states/solvation) in some liquids requires a reformulation of the governing Boltzmann equation to account for the combined localised–delocalised nature of the resulting electron transport. A generalised Boltzmann equation is presented which is highlighted to produce dispersive transport observed in some liquid systems.

Item ID: 55062
Item Type: Article (Refereed Research - C1)
Keywords: plasmas, liquids, biomolecules, Boltzmann equation, electron swarms, transport coefficients
ISSN: 1361-6595
Funders: Australian Research Council (ARC), Australian Academy of Science, CONACYT, Mexico
Projects and Grants: ARC DP160102787, ARC DP180101655, CONACYT 240073
Date Deposited: 04 Sep 2018 05:47
FoR Codes: 02 PHYSICAL SCIENCES > 0204 Condensed Matter Physics > 020405 Soft Condensed Matter @ 50%
02 PHYSICAL SCIENCES > 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics > 020204 Plasma Physics; Fusion Plasmas; Electrical Discharges @ 50%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970102 Expanding Knowledge in the Physical Sciences @ 100%
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