Comparison of low cost lasers for graphene oxide thin films reduction

Abstract

In this work we made reduction of graphene oxide films with different low-cost lasers (near IR (1060 nm) and blue (445 nm) to investigate possibility of such films usage for flexible electronic and nanoelectronic applications. We successfully showed possibility of graphene oxide reduction with both types of laser but blue laser showed better uniformity of reduced graphene oxide film parameters including film morphology, resistance and Raman intensity ratios. We showed that reduction with near IR laser spills out into large nonuniformity of resistance with relatively high values. Thus the usability of commercially available laser facility for graphene oxide modification without adjusting control settings (on hardware and software levels) is poor. On the other hand, relatively laboratory device based on low-power blue laser showed much better usability an it’s perspective to future market of low-cost modification facilities for thin carbon-based films.

Effect of Ambient Environment on Laser Reduction of Graphene Oxide for Applications in Electrochemical Sensing

“…Their work demonstrated higher power densities correlated to lower sheet resistance films, achieving values as low as 1300 Ωsq −1 using a CO 2 laser. Komarov et al [ 40 ] compared reduced graphene oxide films produced using low-cost lasers, concluding that shorter wavelengths produce better quality films. Mortazavi et al [ 41 ] also demonstrated the advantages of a shorter wavelength using a 10 ns pulsed KrF excimer laser operating at a wavelength of 248 nm to thermally reduce graphene oxide, achieving the greatest reduction at laser fluences of 10 mJcm −2 to 30 mJcm −2 before the onset of ablation.…”