Optical and electrical characterization of an atmospheric pressure microplasma jet with a capillary electrode

Journal Article · Mon Mar 15 00:00:00 EDT 2010 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3330507· OSTI ID:21347207

Park, Hye Sun ^[1]; Kim, Sun Ja; Joh, H M; Bae, S H ^[2]; Chung, T H ^[1]; Leem, S H ^[3]

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1. Department of Nano Engineering, Dong-A University, Busan 604-714 (Korea, Republic of)
2. Department of Physics, Dong-A University, Busan 604-714 (Korea, Republic of)
3. Department of Biological Science, Dong-A University, Busan 604-714 (Korea, Republic of)

A microplasma jet with a capillary electrode working at atmospheric pressure is developed to create nonthermal plasma. This jet can be operated at an excitation frequency either in several tens of kilohertz ac range (or pulsed voltage with a repetition rate of kilohertz range) or in radio-frequency range. The working gas, helium or argon, and the additive gas, oxygen, are fed into the plasma jet. The discharge has been characterized by optical emission spectroscopy. The electrical property of the discharge has been studied by means of voltage and current probes. The dynamic nature of the plume is investigated by using intensified charged coupled device camera. The electron temperature is estimated from the modified Boltzmann plot method utilizing the Ar 4p->4s transitions. The plume temperature is determined by using the fitting the fine structure of the emission bands of OH molecules and by utilizing the line shape of the transition. They are compared with the results obtained by optical fiber thermometer. The characteristics of plasma jet are studied by employing different excitation mode and by adjusting the gas flow rates, the applied voltage, and the amount of additive O{sub 2} flow. The characteristic differences between the Ar plasma jet and the He plasma jet are compared. The effects of the additive O{sub 2} gas are investigated. The plasma bullet velocity is found to increase with the applied voltage but to decrease with the duty cycle. Also the preliminary results of microplasma effects on the human breast cancer cells are presented.

• OSTI ID: 21347207
• Journal Information: Physics of Plasmas, Vol. 17, Issue 3; Other Information: DOI: 10.1063/1.3330507; (c) 2010 American Institute of Physics; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ARGON
ATMOSPHERIC PRESSURE
CAPILLARIES
ELECTRIC DISCHARGES
ELECTRODES
ELECTRON TEMPERATURE
EMISSION SPECTROSCOPY
HELIUM
MAMMARY GLANDS
NEOPLASMS
OPTICAL FIBERS
OXYGEN
PLASMA JETS
THERMOMETERS
BLOOD VESSELS
BODY
CARDIOVASCULAR SYSTEM
DISEASES
ELEMENTS
FIBERS
FLUIDS
GASES
GLANDS
MEASURING INSTRUMENTS
NONMETALS
ORGANS
RARE GASES
SPECTROSCOPY