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Related Experiment Video

Updated: Sep 23, 2025

Treating Surfaces with a Cold Atmospheric Pressure Plasma using the COST-Jet

Treating Surfaces with a Cold Atmospheric Pressure Plasma using the COST-Jet

Published on: November 2, 2020

Plasma-induced surface cooling.

John A Tomko¹, Michael J Johnson², David R Boris³

¹Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, VA, 22904, USA. jat6rs@virginia.edu.

Nature Communications

|May 13, 2022

Summary

This summary is machine-generated.

This study reveals pulsed plasma can transiently cool material surfaces, a novel finding in plasma-surface interactions. Photon-stimulated desorption is identified as the likely cause of this unexpected plasma cooling effect.

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Last Updated: Sep 23, 2025

Treating Surfaces with a Cold Atmospheric Pressure Plasma using the COST-Jet

Treating Surfaces with a Cold Atmospheric Pressure Plasma using the COST-Jet

Published on: November 2, 2020

Preparation of Light-responsive Membranes by a Combined Surface Grafting and Postmodification Process

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Published on: March 21, 2014

Emission Spectroscopic Boundary Layer Investigation during Ablative Material Testing in Plasmatron

Emission Spectroscopic Boundary Layer Investigation during Ablative Material Testing in Plasmatron

Published on: June 9, 2016

Area of Science:

Materials Science
Plasma Physics
Surface Science

Background:

Plasmas are crucial for materials engineering, enabling surface modification through energy and species delivery.
Plasma-surface interactions typically involve heating, driving localized physicochemical processes.
Direct measurement of transient thermal responses during plasma exposure has been lacking.

Purpose of the Study:

To directly measure the localized, transient thermal response of a material surface during pulsed plasma exposure.
To investigate the mechanisms behind observed 'plasma cooling' phenomena.
To correlate plasma characteristics with material surface temperature changes.

Main Methods:

Utilized time-resolved optical thermometry for in-situ surface temperature measurement.
Employed time-resolved plasma diagnostics to analyze photon and charged particle flux.
Correlated thermal data with plasma diagnostic measurements.

Main Results:

Demonstrated that pulsed plasma energy flux causes both heating and transient cooling of the material surface.
Identified a correlation between plasma diagnostics and the observed thermal response.
Photon-stimulated desorption of surface adsorbates emerged as the probable cause of plasma cooling.

Conclusions:

Pulsed plasmas can induce transient cooling on material surfaces, challenging conventional understanding.
Photon-stimulated desorption is the most likely mechanism responsible for this observed plasma cooling.
This finding opens new avenues for controlling plasma-surface thermal dynamics.