60902 20200221144319.0 doi 10.1088/0957-4484/27/36/365708 sideral 96313 ART-2016-96313 eng Gross, K. Electrical conductivity of oxidized-graphenic nanoplatelets obtained from bamboo: Effect of the oxygen content 2016 Access copy available to the general public Unrestricted The large-scale production of graphene and reduced-graphene oxide (rGO) requires low-cost and eco-friendly synthesis methods. We employed a new, simple, cost-effective pyrolytic method to synthetize oxidized-graphenic nanoplatelets (OGNP) using bamboo pyroligneous acid (BPA) as a source. Thorough analyses via high-resolution transmission electron microscopy and electron energy-loss spectroscopy provides a complete structural and chemical description at the local scale of these samples. In particular, we found that at the highest carbonization temperature the OGNP-BPA are mainly in a sp2 bonding configuration (sp2 fraction of 87%). To determine the electrical properties of single nanoplatelets, these were contacted by Pt nanowires deposited through focused-ion-beam-induced deposition techniques. Increased conductivity by two orders of magnitude is observed as oxygen content decreases from 17% to 5%, reaching a value of 2.3 103 S m-1 at the lowest oxygen content. Temperature-dependent conductivity reveals a semiconductor transport behavior, described by the Mott three-dimensional variable range hopping mechanism. From the localization length, we estimate a band-gap value of 0.22(2) eV for an oxygen content of 5%. This investigation demonstrates the great potential of the OGNP-BPA for technological applications, given that their structural and electrical behavior is similar to the highly reduced rGO sheets obtained by more sophisticated conventional synthesis methods. info:eu-repo/grantAgreement/ES/MINECO/FIS2013-46159-C3-3-P This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 642742-Enabling Excellence info:eu-repo/grantAgreement/EC/H2020/642742/EU/Graphene-based nanomaterials for touchscreen technologies: Comprehension, Commerce and Communication/Enabling Excellence info:eu-repo/grantAgreement/EC/FP7/604391/EU/Graphene-Based Revolutions in ICT And Beyond/GRAPHENE info:eu-repo/grantAgreement/EC/FP7/312483/EU/Enabling Science and Technology through European Electron Microscopy/ESTEEM 2 info:eu-repo/grantAgreement/ES/DGA/E26 info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 3.44 2016 MATERIALS SCIENCE, MULTIDISCIPLINARY 59 / 275 = 0.215 2016 Q1 T1 PHYSICS, APPLIED 27 / 147 = 0.184 2016 Q1 T1 NANOSCIENCE & NANOTECHNOLOGY 34 / 87 = 0.391 2016 Q2 T2 1.339 2016 Bioengineering 2016 Q1 Chemistry (miscellaneous) 2016 Q1 Electrical and Electronic Engineering 2016 Q1 Nanoscience and Nanotechnology 2016 Q1 Mechanical Engineering 2016 Q1 Mechanics of Materials 2016 Q1 Materials Science (miscellaneous) 2016 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Barragán, J.J.P. (orcid)0000-0002-4123-487X Sangiao, S. (orcid)0000-0001-9566-0738 De Teresa, J.M. Universidad de Zaragoza Lajaunie, L. (orcid)0000-0002-2071-9093 Arenal, R. Universidad de Zaragoza Calderón, H.A. Prieto, P. 2003 395 Universidad de Zaragoza Dpto. Física Materia Condensa. Área Física Materia Condensada 27, 36 (2016), 365708 [10 pp.] Nanotechnology Nanotechnology 0957-4484 967992 http://zaguan.unizar.es/record/60902/files/texto_completo.pdf Postprint 86870 http://zaguan.unizar.es/record/60902/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:60902 articulos driver 2020-02-21-13:41:02 ARTICLE