Kiel Nano, Surface and Interface Science (KiNSIS)

Transient atmospheric plasmas – mastering the nonequilibrium (Prof. Dr. Achim von Keudell, Bochum)

Apr 27, 2021 from 04:15 PM

Online

Foto von KeudellAbstract

Non equilibrium atmospheric plasmas form the unique basis for a multitude of applications ranging from thin films, surface modification, plasma chemistry to plasma medicine. In all these cases atmospheric pressure plasmas exhibit an intimate coupling to the bounding surfaces that trigger surface and conversion processes. The complexity of these processes makes a detailed understanding very challenging. Prominent examples are the combination of plasmas and catalysis and of plasmas and electrolysis. Plasmas provide either excited species to change the conversion reaction paths or they alter and may regenerate catalytic surfaces. The analysis requires detailed diagnostics of plasma excitation and surface processes at the plasma-solid or the plasma-liquid-solid interfaces. Three examples are being presented: (i) the conversion of CO2 and of volatile organic compounds is studied in atmospheric pressure plasmas revealing a strong non equilibrium with respect to excitation temperatures and plasma dynamics; (ii) the conversion of water by plasma excitation using nanosecond high voltage pulses that trigger extremely high density plasmas that are governed by field effects at the interfaces and by tunneling in between adjacent water molecules during plasma propagation; (iii) the plasma induced triggering of enzyme driven species conversion in biocatalysis. The work is supported by the SFB 1316 “Transient atmospheric pressure plasmas – from plasmas to liquids to solids”.

Access to the video meeting
The talk is part of the "Physikalisches Kolloquium", everybody interested is welcome.

Prof. Benedikt

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  • 16:15: Transient atmospheric plasmas – mastering the nonequilibrium (Prof. Dr. Achim von Keudell, Bochum)
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  • 16:15: From physics today to publishing and research of tomorrow (Prof. Dr. Claudia Draxl, Humboldt-Universität zu Berlin)
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5
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  • 17:00: Leben auf Exoplaneten? 3. Akt (Prof. Dr. Ruth Schmitz-Streit, Prof. Dr. Wolfgang J. Duschl, Prof. Dr. Ulrich Lüning)
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  • all day: Light-Induced phase transitions in strongly correlated systems (Prof. Fabrizio Carbone, École Polytechnique Fédérale de Lausanne)
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  • 16:15: Transient atmospheric plasmas – mastering the nonequilibrium (Prof. Dr. Achim von Keudell, Bochum)
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