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Related Concept Videos

Van de Graaff Generator01:15

Van de Graaff Generator

Van de Graaff generators (or Van de Graaffs) are devices used to demonstrate high voltage due to static electricity that can also be used for research. Robert Van de Graaff first built one in 1931 (based on original suggestions by Lord Kelvin) for use in nuclear physics research.
Van de Graaff uses both smooth and pointed surfaces, conductors, and insulators to generate large static charges and, hence, large voltages. A substantial excess charge can be deposited on the sphere because it moves...

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Treating Surfaces with a Cold Atmospheric Pressure Plasma using the COST-Jet
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Published on: November 2, 2020

Cold plasma brush generated at atmospheric pressure.

Yixiang Duan1, C Huang, Q S Yu

  • 1C-CSE, MS K484, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA. yduan@lanl.gov

The Review of Scientific Instruments
|May 17, 2007
PubMed
Summary

A novel cold plasma brush operating at atmospheric pressure offers efficient, low-power surface treatment. This argon-based device modifies polymer wettability rapidly, demonstrating potential for versatile material applications.

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Last Updated: Jul 14, 2026

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Area of Science:

  • Plasma Science and Engineering
  • Surface Science and Materials Modification

Background:

  • Atmospheric pressure plasmas offer advantages for material processing.
  • Existing methods often require high power or complex setups.
  • Need for efficient, low-power plasma sources for surface treatment.

Purpose of the Study:

  • To develop and characterize a novel cold plasma brush.
  • To investigate its potential for efficient surface treatment of polymers.
  • To evaluate its performance in terms of power consumption and operational parameters.

Main Methods:

  • Generation of a brush-shaped cold plasma at atmospheric pressure using argon gas.
  • Operation in continuous and pulsed modes with power consumption ranging from 4 W to 45 W.
  • Characterization of plasma dimensions, gas temperature, and operating voltage/flow rate.
  • Surface treatment of polymer films to assess changes in wettability.

Main Results:

  • A stable, brush-shaped plasma (10-15 mm width, <1.0 mm thickness) was generated.
  • Gas phase temperatures remained near room temperature (as low as 42°C) at high gas flow rates (3500 ml/min).
  • Successful modification of polymer surface wettability from hydrophobic to hydrophilic within seconds.
  • Low power consumption (4-45 W) and efficient use of plasma gas demonstrated.

Conclusions:

  • The developed cold plasma brush is an efficient, low-power tool for atmospheric pressure surface modification.
  • Its unique brush-like plasma characteristics and room-temperature operation are advantageous.
  • The device shows significant potential for various material and surface treatment applications, including battery-powered systems.