Plasma polymer deposition of neutral agent carvacrol on a metallic surface by using dielectric barrier discharge plasma in ambient air

Abstract

This experiment was conducted by newly designed home-made planar type DBD plasma generator in ambient, with industrial argon as the primary plasma-forming and a carrier gas of monomer. Natural agent Carvacrol monomer was used as a precursor in order to deposit plasma polymeric thin film on the surface of metallic material. The discharge characteristics including, the plasma active power, the discharge voltage, and current were diagnosed. The applied voltage was measured by using a voltage divider and the current and the discharge-charge were measured by using the drop of voltage on a resistor and capacitor, respectively. The characteristics of the thin film deposited are presented by varying discharge conditions. The structures of the film, aging, and adhesion were characterized by infrared reflectance spectroscopy and its thicknesses and roughness by profilometry. The obtained thin film was exhibited smooth, dense, uniform, and having chemical similarity to carvacrol monomer. The obtained thin film also exhibited a high thermal resistivity, strong crosslink with good adhesion to the metallic surface. In general, the thin film can be used for practical application as the surface of a biomaterial.