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  Charge separation and isolation in strong water droplet impacts.

Wiederschein, F., Vöhringer-Martinez, E., Beinsen, A., Postberg, F., Schmidt, J., Srama, R., et al. (2015). Charge separation and isolation in strong water droplet impacts. Physical Chemistry Chemical Physics, 17(10), 6858-6864. doi:10.1039/C4CP05618C.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0025-777B-0 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-CC56-6
Genre: Journal Article

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Wiederschein, F.1, Author              
Vöhringer-Martinez, E., Author
Beinsen, A., Author
Postberg, F., Author
Schmidt, J., Author
Srama, R., Author
Stolz, F., Author
Grubmüller, H.1, Author              
Abel, B., Author
Affiliations:
1Department of Theoretical and Computational Biophysics, MPI for biophysical chemistry, Max Planck Society, ou_578631              

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 Abstract: Charge separation in condensed matter after strong impacts is a general and intriguing phenomenon in nature, which is often identified and described but not necessarily well understood in terms of a quantitative mechanistic picture. Here we show that charge separation naturally occurs if water droplets/clusters or ice particles with embedded charge carriers, e.g., ions, encounter a high energy impact with subsequent dispersion – even if the involved kinetic energy is significantly below the molecular ionization energy. We find that for low charge carrier concentrations (c < 0.01 mol L−1) a simple statistical Poisson model describes the charge distribution in the resulting molecular “fragments” or aggregates. At higher concentrations Coulomb interactions between the charge carriers become relevant, which we describe by a Monte Carlo approach. Our models are compared to experimental data for strong (laser) impacts on liquid micro beams and discussed for the charge generation in cluster-impact mass spectrometry on cosmic dust detectors where particle kinetic energies are below the plasma threshold. Taken together, a simple and intuitive but quantitative microscopic model is obtained, which may contribute to the understanding of a larger range of phenomena related to charge generation and separation in nature.

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Language(s): eng - English
 Dates: 2015-02-022015
 Publication Status: Published in print
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1039/C4CP05618C
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Title: Physical Chemistry Chemical Physics
Source Genre: Journal
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Pages: - Volume / Issue: 17 (10) Sequence Number: - Start / End Page: 6858 - 6864 Identifier: -