Surface treatment comparison using atmospheric helium plasma jets with different frequencies and target objects

• Published in: Thin solid films Vol. 518; no. 22; pp. 6700 - 6703
• Main Authors: Kim, Dan Bee, Gweon, B., Moon, S.Y., Choe, W.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.09.2010; Elsevier
• Subjects: Atmospheric pressure plasma; Atmospherics; Biomaterials; Corona; Electrodes; Exact sciences and technology; Feasibility studies; Frequency; Physics; Physics of gases, plasmas and electric discharges; Physics of plasmas and electric discharges; Plasma applications; Pork; Radio frequencies; Surface treatment; Surgical implants; Frequency; Corona; Atmospheric pressure plasma; Surface treatment; High-frequency discharges; Biomedical materials; Plasma jets; Atmospheric pressure; Plasma assisted processing; Surface treatments; Thermal plasma; Electrical characteristic
• ISSN: 0040-6090; 1879-2731
• DOI: 10.1016/j.tsf.2010.02.069

This paper details a plasma surface treatment feasibility study conducted for different driving frequencies of low frequency (LF, 50 kHz) and radio-frequency (RF, 13.56 MHz) sources by adding a target plate to a single pin electrode plasma jet system. The plasmas were generated in ambient air with a helium gas supply. The electrical characteristics of the plasmas were studied and compared for cases with and without a plane electrode. The LF plasma was more affected by the presence of the dielectric plate than was the RF plasma, showing a larger increase in its current. In addition, pork samples were treated to assess the electrical and thermal safety of plasma biomaterial surface treatments. The LF plasma conduction current and temperature during the pork treatment were 0.5 mA and 22 °C, and those of the RF plasma were 40 mA and 31 °C at maximum.