Atmospheric Pressure Plasma with Micro Interdigitated Electrode for Polymer Surface Modification.

Optically and mechanically excellent properties of polymer are importance for developing of recent polymer-based device such as microfluidics. Polystyrene (PS) in cell and tissue culture and polymethyl methacrylate (PMMA) in contact lens are well-known polymers in early biomedical research. In recent, cyclic olefin polymer (COP) also known as cyclic olefin copolymer (COC) with higher transparency, low autofluorescence, and higher heat resistant is getting importance in development of microfluidics.

In this study, we developed an atmospheric pressure plasma device with a micro interdigitated electrode for polymer surface modification. Frequency dependence between 10 to 90 kHz was investigated on the surface modification.

Electrical and optical characteristics are investigated with various gases e.g., helium, argon, and humid air. Water contact angle was measured under various frequencies between 10 kHz and 90 kHz and we successfully modified the polymer surface under the condition.