1. Physical investigation of electrophoretically deposited graphene oxide and reduced graphene oxide thin films
- Author
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Carlo Versace, Federica Ciuchi, Enzo Cazzanelli, Grazia Giuseppina Politano, Marco Castriota, Angela Fasanella, Carlo Vena, and Giovanni Desiderio
- Subjects
Materials science ,business.industry ,Graphene ,Annealing (metallurgy) ,Analytical chemistry ,Oxide ,General Physics and Astronomy ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,law.invention ,chemistry.chemical_compound ,Electrophoretic deposition ,chemistry ,law ,Optoelectronics ,Thin film ,0210 nano-technology ,business ,Ohmic contact ,Graphene nanoribbons ,Graphene oxide paper - Abstract
Graphene oxide and reduced graphene oxide thin films are very promising materials because they can be used in optoelectronic devices and in a growing range of applications such as touch screens and flexible displays. In this work, graphene oxide (GO) and thermally reduced graphene oxide (rGO) thin films, deposited on Ti/glass substrates, have been obtained by electrophoretic deposition. The morphological and the structural properties of the samples have been investigated by micro-Raman technique, X-ray reflectometry, and SEM analysis. In order to study the optical and electrical properties, variable angle spectroscopic ellipsometry and impedance analysis have been performed. The thermal annealing changes strongly the structural, electrical, and optical properties, because during the thermal processes some amount of sp3 bonds originally present in GO were removed. In particular, the annealing enhances the Ohmic behavior of the rGO film increasing its conductivity and the estimated optical density. Moreover...
- Published
- 2016