Kiel Nano, Surface and Interface Science (KiNSIS)

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

May 18, 2021 from 04:15 PM

Foto von Keudell

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”.

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The talk ist part of the "Physikalische Kolloquium", everybody interested is cordially invited.

 

Prof. Benedikt

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  • all day: KiNSIS Colloquium: KiNSIS Benchmarking (Prof. Dr. Malte Behrens, Inorganic Solid State Chemistry, CAU)
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  • 16:15: Quantum carpets: A tool to observe decoherence (Prof. Dr. Wolfgang Schleich, University Ulm)
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  • all day: NanoTech Poland 2021
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  • all day: NanoTech Poland 2021
  • 16:00: Toward an objective assessment of mobility in clinical and daily activity assessments (Arash Atrsaei, EPFL)
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11
  • all day: NanoTech Poland 2021
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12 13
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  • 16:15: Femtosecond science on-chip: Capturing light-induced anomalous Hall currents in graphene (Dr. James McIver, Max Planck Institute for the Structure and Dynamics of Matter)
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16 17
  • 17:00: Chemie in unterschiedlichen Dimensionen - von Molekülen über supramolekulare Aggregate zu optoelektronischen Bauteilen (Prof. Dr. Arne Lützen, Uni Bonn)
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  • 16:15: The present and future of ESA's science program (Prof. Dr. Günther Hasinger, Director of Science, ESA)
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23 24
  • 17:00: Leading beyond Chemistry: Research and Development at Evonik Industries AG (Dr. Felix Müller, Evonik Industries AG)
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  • 16:15: Plasma 2020 – The US National Academies Decadal Assessment of Plasma Physics: Overview and Future Research Opportunities (Prof. Dr. Mark J. Kushner, University of Michigan)
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