Tuning oxidation level, electrical conductance and band gap structure on graphene sheets by cyclic atomic layer reduction technique
- Xiamen Univ. of Technology, Xiamen, Fujian (China). Fujian Provincial Key Lab. of Functional Materials and Applications, Inst. of Material Preparation and Applied Technology, School of Materials Science and Engineering
- Yuan Ze Univ. Taoyuan (Taiwan). Dept. of Chemical Engineering and Materials Science; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Mechanical, Aerospace, and Biomedical Engineering
- Yuan Ze Univ. Taoyuan (Taiwan). Dept. of Chemical Engineering and Materials Science
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Nuclear Science and Engineering and Dept. of Materials Science and Engineering; National Central Univ., Taoyuan (Taiwan). Inst. of Materials Science and Engineering
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Energy and Transportation Science Division
- Univ. of Tennessee, Knoxville, TN (United States). Dept. of Mechanical, Aerospace, and Biomedical Engineering
The present work develops an atomic layer reduction (ALR) method to accurately tune oxidation level, electrical conductance, band-gap structure, and photoluminescence (PL) response of graphene oxide (GO) sheets. The ALR route is carried out at 200 °C within ALR cycle number of 10–100. The ALR treatment is capable of striping surface functionalities (e.g., hydroxyl, carbonyl, and carboxylic groups), producing thermally-reduced GO sheets. The ALR cycle number serves as a controlling factor in adjusting the crystalline, surface chemistry, electrical, optical properties of GO sheets. With increasing the ALR cycle number, ALR-GO sheets display a high crystallinity, a low oxidation level, an improved electrical conductivity, a narrow band gap, and a tunable PL response. Finally, on the basis of the results, the ALR technique offers a great potential for accurately tune electrical and optical properties of carbon materials through the cyclic removal of oxygen functionalities, without any complicated thermal and chemical desorption processes.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- Grant/Contract Number:
- AC05-00OR22725; MOST 105-2628-E-155-002-MY3; MOST 105-2221-E-155-014-MY3
- OSTI ID:
- 1439927
- Journal Information:
- Carbon, Vol. 137, Issue C; ISSN 0008-6223
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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