Electrical conductivity of oxidized-graphenic nanoplatelets obtained from bamboo: Effect of the oxygen content

Gross, K. ; Barragán, J.J.P. ; Sangiao, S. ; De Teresa, J.M. (Universidad de Zaragoza) ; Lajaunie, L. ; Arenal, R. (Universidad de Zaragoza) ; Calderón, H.A. ; Prieto, P.

Resumen: 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.

Idioma: Inglés

DOI: 10.1088/0957-4484/27/36/365708

Año: 2016

Publicado en: Nanotechnology 27, 36 (2016), 365708 [10 pp.]
ISSN: 0957-4484

Factor impacto JCR: 3.44 (2016)

Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 59 / 275 = 0.215 (2016) - Q1 - T1
Categ. JCR: PHYSICS, APPLIED rank: 27 / 147 = 0.184 (2016) - Q1 - T1
Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 34 / 87 = 0.391 (2016) - Q2 - T2

Factor impacto SCIMAGO: 1.339 - Bioengineering (Q1) - Chemistry (miscellaneous) (Q1) - Electrical and Electronic Engineering (Q1) - Nanoscience and Nanotechnology (Q1) - Mechanical Engineering (Q1) - Mechanics of Materials (Q1) - Materials Science (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA/E26
Financiación: info:eu-repo/grantAgreement/EC/FP7/312483/EU/Enabling Science and Technology through European Electron Microscopy/ESTEEM 2
Financiación: info:eu-repo/grantAgreement/EC/FP7/604391/EU/Graphene-Based Revolutions in ICT And Beyond/GRAPHENE
Financiación: info:eu-repo/grantAgreement/EC/H2020/642742/EU/Graphene-based nanomaterials for touchscreen technologies: Comprehension, Commerce and Communication/Enabling Excellence
Financiación: info:eu-repo/grantAgreement/ES/MINECO/FIS2013-46159-C3-3-P

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)