TITLE:
Comparison of Surface Modification of CR-39 Polymer Film Using RF and DC Glow Discharges Plasma
AUTHORS:
Mohamed Hassouba, Nagia Dawood
KEYWORDS:
Surface Modification by Plasma, RF Discharge, DC Discharge, CR-39 Polymer Film
JOURNAL NAME:
Journal of Modern Physics,
Vol.8 No.12,
November
28,
2017
ABSTRACT: Surfaces of optical elements are deposited by antireflection coatings (ARCs) to decrease the reflection of light. Surface needs treatment before depositing the ARC one of treatment processes by plasma for adhesion improvement and surface hardening. A comparison of RF and DC glow discharges treated CR-39 polymer films gives insight into the mechanism of these surface processes. The surface properties of the plasma-treated samples are examined by microscopy techniques include contact angle measurements, scanning electron microscopy (SEM), atomic force microscopy (AFM), infrared (IR) spectroscopy and refractive index measurements. Results show that the plasma treatment modifies the polymer surface in both composition and morphology. It is found that the surface wettability is enhanced after plasma treatment. It is found that, RF plasma is more effective than DC plasma in CR-39 surface modification, as it implants more oxygen atoms into the surface and makes the contact angle declining to a lower level.