Abstract
Re-establishment of electrical conductivity in graphene oxide (GO), the insulating form of graphene, is (partially) accomplished by reduction through high temperature treatments in a reducing atmosphere, or using strongly reducing chemicals or electrolytic processes. The reduction methods are suited for bulk graphene oxide. Spatially resolved reduction of thin films of graphene oxide is important for a wide range of applications such as in microelectronics, where an electrolyte-free, room temperature reduction process is needed. Here, we present spatially resolved solid-state reduction of graphene oxide thin films. We demonstrate that the reduction mechanism is based on electrolysis of water that is adsorbed on the graphene oxide thin film. The reduced graphene oxide thin-films show sheet resistance of only several kOhm, with weak temperature dependence. Graphene oxide can be produced on a large scale and processed using low-cost solution casting techniques. Spatially resolved re-establishment of conductivity in GO can be used in electrically controlled water permeation or in micro- and nanoelectronic applications for instance as an anti-fuse.
Original language | English |
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Pages (from-to) | 1176-1184 |
Number of pages | 9 |
Journal | Materials Horizons |
Volume | 5 |
Issue number | 6 |
DOIs | |
Publication status | Published - Nov 2018 |
Funding
M. C. M.-M. acknowledges Gobierno Vasco, Dpto. Industria, Innovación, Comercio y Turismo under the ELKARTEK Program (Grant No. KK-2017/00012) and Dr A. Seifert and Dr M. Knez for letting her to use their laboratory facilities at CIC nanoGUNE. Nerea Gil-Gonzalez was supported by a PhD fellowship from the University of Navarra. K. A. acknowledges the Alexander von Humboldt Foundation for the funding provided in the frame-work of the Sofja Kovalevskaja Award, endowed by the Federal Ministry of Education and Research, Germany. We gratefully acknowledge financial support from the Max Planck Institute for Polymer Research. The authors thank H. Burg and H. J. Menges for the AFM and scanning Raman measurements. Open Access funding provided by the Max Planck Society.
ASJC Scopus subject areas
- General Materials Science
- Mechanics of Materials
- Process Chemistry and Technology
- Electrical and Electronic Engineering