Cold Plasma Surface and Linear/Nonlinear Optical Properties of Poly (Acrylic Acid-Co-Methyl Methacrylate) Hydrogel Film

Abstract

In this current study cold plasma-treated poly (acrylic acid-co-methyl methacrylate) hydrogel P(AA-co-MMA) films for application in optoelectronics devices. The Attenuated total reflectance (ATR)  and X-ray photoelectron spectroscopy (XPS) methods were used to document the impact of hydrogel on the structures, morphologies, and functional groups of the cold plasma, respectively. The optical characteristics of the hydrogel specimens were analysed using UV-Vis spectroscopy. The absorption edge and Urbach energies of films exposed to pure and cold plasma under O₂, N₂, and CO₂ have been calculated using Tauck's formula. As hydrogel surface cold plasma was treated, the Urbach tail decreased from 0.69 eV to 0.53 eV and in lear optical properties the absorbance via the wavelength show n to σ* and also to π* orbital, the nonlinear dispersion characteristics and optical susceptibilities of pure and plasma-treated materials were recorded. The processed samples showed improved structural and linear/nonlinear optical properties, rendering them appropriate for use in optoelectronics.