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Title: Non-equilibrium atmospheric pressure microplasma jet: An approach to endoscopic therapies

Atmospheric pressure microplasma jet generated in a long hollow core optical fiber is studied to verify the potential feasibility of endoscopic therapies. Thermal damage and electric shock to the human body were suppressed by two technical methods, i.e., the high-voltage resistant flexible tube wrapped on the optical fiber and a power resistor of 100 kΩ connected between the power supply and the copper foil electrode. Optical emission spectra analysis indicated that many kinds of active radicals like excited atomic O and OH, were generated in the microplasma jet. In addition, the applications of the microplasma jet on sterilization and lung cancer cell apoptosis were presented. After 5 min of exposures to the microplasma jet, the cell viability and the bacillus subtilis replication decreased to about 3% and zero, respectively. More investigations are needed to improve the plasma-aided endoscopic therapies.
Authors:
; ; ;  [1] ;
  1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031 (China)
Publication Date:
OSTI Identifier:
22220688
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 8; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
60 APPLIED LIFE SCIENCES; ATMOSPHERIC PRESSURE; BACILLUS SUBTILIS; COPPER; ELECTRIC POTENTIAL; ELECTRIC SHOCK; EMISSION SPECTRA; LUNGS; NEOPLASMS; OPTICAL FIBERS; OXYGEN; PLASMA DIAGNOSTICS; PLASMA JETS; RADIOTHERAPY; RESISTORS; STERILIZATION