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Laser-induced chemical transformation of graphene oxide–iron oxide nanoparticles composites deposited on polymer substrates

Angel Pérez del Pino, Eniko György, Constantin Logofatu, Josep Puigmartí-Luis, Wei Ga; 
Carbon, Volume 93, November 2015, Pages 373–383



doi:10.1016/j.carbon.2015.05.078

Ultraviolet laser irradiation of films composed of graphene oxide (GO) and GO–magnetite (Fe3O4) nanoparticles deposited on polydimethylsiloxane substrates is carried out. The irradiations are performed in vacuum and ammonia-rich gas environments. Electron and scanning probe microscopies reveal a rippling process in GO sheets as the accumulation of laser pulses proceeds, being the effect more pronounced with the increase of laser fluence. X-ray photoelectron spectroscopy analyses point to laser-induced chemical reaction pathways in GO completely different depending on the environment and the presence or absence of Fe3O4 nanoparticles. It is demonstrated that GO-based films with diverse type of oxygen- and nitrogen-containing chemical groups can be obtained by means of laser irradiation processes. The sheet resistance of these materials is also correlated to their structure and composition.

 

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