Generolo Jono Žemaičio Lietuvos karo akademija

The paper presents the results of research on the effect of laser photolithography on graphene oxide (GO) fixed on the silicon wafer and PVC plate (polyvinyl chloride). Before fixing the graphene oxide, the surface was treated with plasma cleaning in the argon atmosphere. Then deposition with AZ4533 photoresist and laser photolithography were carried out. Analysis of the spectral characteristics and structural tests proved that graphene oxide was not damaged during exposing to a laser beam. The laser photolithography process was followed with observation of typical FTIR-ATR bonds originating from COOH, C=O and C-O-C typical for GO. The pattern (on the GO + AZ4533 coating) was exposed to the laser beam (GaN) and revealed by a developing agent. That was a base for continuation of further research with a purpose of ion etching.

The possibilities of nanoparticles fabrication from the selected metals: copper, brass and 18Cr9Ni steel by laser ablation method were investigated. For the nanoparticles extraction process the most favorable pulse laser parameters were selected such as: laser beam power, number of laser pulses and distance of the beam focus from the metal foil. The SEM analysis confirmed the presence of nanospheres and nanowires geometry of metal particles.

Presented paper shows results of the tensile strength of the rGO-PDMS composite (pure PDMS doped with reduced graphene oxide (rGO). As a result, the relative elongation of the rGO-PDMS was obtained reaching 600% as compared to control samples before breaking of the composite. Microfractographic measurements of fracture in static tensile test showed delamination in places where rGO flakes were present, what favored the initiation of breaking process. The decrease of the Young module was observed by 8% when PDMS was doped with reduced graphene oxide.