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Related Experiment Video

Updated: Jan 3, 2026

Luminescence Lifetime Imaging of O2 with a Frequency-Domain-Based Camera System

Luminescence Lifetime Imaging of O2 with a Frequency-Domain-Based Camera System

Published on: December 16, 2019

Oxygen-Sensitive Layered MoTe₂ Channels for Environmental Detection.

Shih-Hsien Yang¹, Che-Yi Lin², Yuan-Ming Chang

¹International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics , Shenzhen University , Shenzhen 518060 , China.

ACS Applied Materials & Interfaces

|November 21, 2019

Summary

Multilayered molybdenum ditelluride (MoTe₂) channels show resistance changes with oxygen (O₂) levels. Joule heating enables repeatable oxygen detection, indicating MoTe₂

Keywords:

MoTe2 O2 index layered electronics oxygen detection repeatable

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Last Updated: Jan 3, 2026

Luminescence Lifetime Imaging of O2 with a Frequency-Domain-Based Camera System

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Published on: December 16, 2019

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In Vitro Multiparametric Cellular Analysis by Micro Organic Charge-modulated Field-effect Transistor Arrays

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Published on: September 20, 2021

Area of Science:

Materials Science
Nanoscience
Chemical Sensing

Background:

Molybdenum ditelluride (MoTe₂) is a layered material with unique electronic properties.
Oxygen (O₂) significantly influences the electrical characteristics of semiconductor materials.
Understanding O₂ interactions is crucial for developing novel electronic devices and sensors.

Purpose of the Study:

To investigate the oxygen-dependent resistance changes in multilayered MoTe₂ channels.
To explore the potential of MoTe₂ field-effect transistors for oxygen sensing applications.
To characterize the effect of Joule heating on oxygen interaction with MoTe₂.

Main Methods:

Fabrication and characterization of multilayered MoTe₂ field-effect transistors.
Measurement of channel resistance variations in response to different oxygen concentrations.
Application of Joule heating to induce and study oxygen desorption and re-adsorption.

Main Results:

A reproducible 'O₂ index' based on channel resistance was established to quantify relative oxygen content.
Joule heating drastically reduced the O₂ index from 100% to 12.1% in back gate modulation.
Effective oxygen desorption from the MoTe₂ surface was observed due to Joule heating, enabling repeatable detection.

Conclusions:

Multilayered MoTe₂ channels exhibit significant oxygen-dependent electrical properties.
Joule heating facilitates reversible oxygen interaction, crucial for sensor reset and reusability.
MoTe₂ channels show promise as a viable material for environmental oxygen sensing.