Highly Conductive and Transparent Reduced Graphene Oxide Nanoscale Films via Thermal Conversion of Polymer-Encapsulated Graphene Oxide Sheets
| Autor: | Yimei Wen, Kesong Hu, Igor Luzinov, Ruslan Burtovyy, Ruilong Ma, Mark Anayee, Hongmei Li, Mykhailo Savchak, W. R. Harrell, Goutam Koley, George Chumanov, Daniel B. Cutshall, Vladimir V. Tsukruk, Nikolay Borodinov, Anise M. Grant |
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| Rok vydání: | 2017 |
| Předmět: |
Fabrication
Materials science Graphene Oxide Nanotechnology 02 engineering and technology Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Dip-coating 0104 chemical sciences Nanomaterials law.invention Indium tin oxide chemistry.chemical_compound chemistry law General Materials Science 0210 nano-technology Layer (electronics) |
| Zdroj: | ACS applied materialsinterfaces. 10(4) |
| ISSN: | 1944-8252 |
| Popis: | Despite noteworthy progress in the fabrication of large-area graphene sheetlike nanomaterials, the vapor-based processing still requires sophisticated equipment and a multistage handling of the material. An alternative approach to manufacturing functional graphene-based films includes the employment of graphene oxide (GO) micrometer-scale sheets as precursors. However, search for a scalable manufacturing technique for the production of high-quality GO nanoscale films with high uniformity and high electrical conductivity is still continuing. Here we show that conventional dip-coating technique can offer fabrication of high quality mono- and bilayered films made of GO sheets. The method is based on our recent discovery that encapsulating individual GO sheets in a nanometer thick molecular brush copolymer layer allows for the nearly perfect formation of the GO layers via dip coating from water. By thermal reduction the bilayers (cemented by a carbon-forming polymer linker) are converted into highly conductive and transparent reduced GO films with a high conductivity up to 104 S/cm and optical transparency on the level of 90%. The value is the highest electrical conductivity reported for thermally reduced nanoscale GO films and is close to the conductivity of indium tin oxide currently in use for transparent electronic devices, thus making these layers intriguing candidates for replacement of ITO films. |
| Databáze: | OpenAIRE |
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