Journal
CARBON
Volume 93, Issue -, Pages 373-383Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2015.05.078
Keywords
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Funding
- Spanish Ministry of Economy and Competitiveness [ENE2014-56109-C3-3-R]
- Executive Unit for Financing Higher Education, Research, Development, and Innovation of the Romanian Ministry of Education, Research, Youth, and Sports [PN-II-PT-PCCA-2011-3.2-1235]
- National Nuclear Security Administration of the U.S. Department of Energy [DE-AC52-06NA25396]
- College of Textiles at North Carolina State University
- Ramon y Cajal program from the Spanish Ministry of Economy and Competitiveness [RYC-2011-08071]
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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. (C) 2015 Elsevier Ltd. All rights reserved.
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