Oxygen-Sensitive Layered MoTe2 Channels for Environmental Detection

Shih Hsien Yang, Che Yi Lin, Yuan Ming Chang, Mengjiao Li, Ko Chun Lee, Ciao Fen Chen, Feng Shou Yang, Chen Hsin Lien, Keiji Ueno, Kenji Watanabe, Takashi Taniguchi, Kazuhito Tsukagoshi, Yen Fu Lin

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The oxygen (O2)-dependent resistance change of multilayered molybdenum ditelluride (MoTe2) channels was characterized. A variation of the channel resistance could reproducibly determine relative O2 content (denoted as the O2 index). We found that Joule heating in a layered MoTe2 field-effect transistor caused the O2 index to decrease drastically from 100 to 12.1% in back gate modulation. Furthermore, Joule heating caused effective O2 desorption from the MoTe2 surface and repeatable O2 detection by multilayered MoTe2 channels was realized. This work not only explored the influence of O2 on the electrical properties of multilayered MoTe2 channels but also revealed that MoTe2 channels are promising for sensing O2 in an environmental condition.

Original languageEnglish
Pages (from-to)47047-47053
Number of pages7
JournalACS Applied Materials and Interfaces
Volume11
Issue number50
DOIs
Publication statusPublished - 2019 Dec 18
Externally publishedYes

Keywords

  • MoTe
  • O index
  • layered electronics
  • oxygen detection
  • repeatable

ASJC Scopus subject areas

  • Materials Science(all)

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