期刊
APPLIED PHYSICS LETTERS
卷 108, 期 8, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4942802
关键词
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资金
- Welch Foundation [F-1814]
- National Defense Science and Engineering Graduate (NDSEG) Fellowship [FA9550-11-C-0028]
- Department of Defense
- Southwest Academy of Nanoelectronics (SWAN), a Nanoelectronics Research Initiative (NRI) center
We report the structural and electrical characterization of tungsten oxides formed by illuminating multi-layer tungsten diselenide (WSe2) nanosheets with an intense laser beam in the ambient environment. A noninvasive microwave impedance microscope (MIM) was used to perform electrical imaging of the samples. The local conductivity similar to 10(2) S/m of the oxidized product, measured by the MIM and conventional transport experiments, is much higher than that of the pristine WSe2, suggesting the formation of sub-stoichiometric WO3-x polycrystals with n-type carriers. With further efforts to improve the conductivity of the oxides, the laser-assisted oxidation process may be useful for patterning conductive features on WSe2 or forming electrical contacts to various transition metal dichalcogenides. (C) 2016 AIP Publishing LLC.
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