Paper Title
Laser Ablation of Graphene Nanoribbon-Based Polymer Composites

Abstract
Colloidal stable hybrid latexes reinforced with graphene nanoribbons were used for producing the composite films by water evaporation. Graphene nanoribbons have a unique structure and properties, with many advantages over graphene sheets. It can be incorporated into wide range of polymeric nanocomposites materials. The presence of edge functionalities is an important advantage that may improve the interactions between the polymer and graphene phase. In our research work miniemulsion polymerization was select as most promising synthesis method for hybrid dispersed systems as the present one. For colloidal stabilization alkyldiphenyloxide disulfonate surfactant was used, whereas steryl acrylate as polymerizable co-stabilizer to protect the system against Ostwald ripening process. The polymer was joined with graphene nanoribbons stable dispersion in order to produce 0.2 - 1.0 wt. % of graphene nanoribbons in relation to polymer. The monomers used for the synthesis were methyl metacrylate/butylacrylate/hydroxyethymetacrylate in the following weight ratios 49.5/49.5/1, respectively. As a result stable in situ hybrid dispersions were obtained, from which composite films were prepared by water evaporation at standard atmospheric conditions. In order to increase the conductivity properties of the nanocomposites obtained by miniemulsion polymerization, the laser ablation was used for deposition the thin films from nanocomposites and graphene nanoribbons. The obtained nanocomposite films were deposited using IR CO2 pulsed laser. The nanocomposites were characterized by means of: FTIR and UV/Vis spectroscopy, DMTA, contact angle measurements; SEM, TEM and AFM microscopy; and conductivity measurements. Keywords - Pulsed Laser Ablation, Polymer/Graphene Nanoribbons Composites