Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 50, Pages 47047-47053Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b15036
Keywords
layered electronics; MoTe2; O-2 index; repeatable; oxygen detection
Funding
- Taiwan Ministry of Science and Technology [MOST 105-2112-M-005-002-MY3, 107-2811-M-005-510, 108-2112-M-005-012-MY3]
- Elemental Strategy Initiative
- CREST, JST [JPMJCR15F3]
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The oxygen (O-2)-dependent resistance change of multilayered molybdenum ditelluride (MoTe2) channels was characterized. A variation of the channel resistance could reproducibly determine relative O-2 content (denoted as the O-2 index). We found that Joule heating in a layered MoTe2 field-effect transistor caused the O-2 index to decrease drastically from 100 to 12.1% in back gate modulation. Furthermore, Joule heating caused effective O-2 desorption from the MoTe2 surface and repeatable O-2 detection by multilayered MoTe2 channels was realized. This work not only explored the influence of O-2 on the electrical properties of multilayered MoTe2 channels but also revealed that MoTe2 channels are promising for sensing O-2 in an environmental condition.
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