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ORIGINAL RESEARCH article

Front. Phys.
Sec. Optics and Photonics
Volume 12 - 2024 | doi: 10.3389/fphy.2024.1446416
This article is part of the Research Topic Acquisition and Application of Multimodal Sensing Information - Volume II View all articles

Enhanced sensing response of the three dimensional MoS2 microstructure for NO2 gas detection at room temperature

Provisionally accepted
Hongdao Cheng Hongdao Cheng 1Sihuan Huang Sihuan Huang 1Zengshan Xing Zengshan Xing 2Lu Yang Lu Yang 1Jianhui Yu Jianhui Yu 1Yongchun Zhong Yongchun Zhong 1*
  • 1 Jinan University, Guangzhou, China
  • 2 Department of Physics, School of Science, Hong Kong University of Science and Technology, Kowloon, Hong Kong, SAR China

The final, formatted version of the article will be published soon.

    As a promising sensing material, Molybdenum disulfide (MoS2) nanosheets is being increasingly studied for Nitrogen dioxide (NO2) gas sensing. However, the MoS2 nanosheets is prone to the stacking effect that compromises the sensing performances. Here, the stacking effect is mitigated by engineering MoS2 nanosheets into a three dimensional (3D) network microstructure, which was fabricated by method of electrostatically self-assembling of MoS2/SiO2 microspheres. The fabricated sensor based on 3D MoS2 network observed a significantly improved response of 15% to 12.3 ppm NO2, which is a 75-fold increase compared to the control sensor with pure MoS2 nanosheets. In addition, the sensitivity of the sensor with 3D MoS2 network was 6.15 times larger than that of the control sensor with pure MoS2 nanosheets. The detection limit of our sensor was 0.297 ppm, lower than most of reported MoS2based NO2 sensors. The enhanced sensitivity and dynamic response stem from the improved interaction between NO2 molecules and MoS2 network, thanks to its increased surface area per footprint of MoS2 nanosheets compared to pure 2D MoS2 film (single-or few-layer). This work presents a new approach to enhancing the performance of gas sensors based on 2D materials.

    Keywords: Molybdenum disulfide, Gas sensing, Three dimensional network microstructure, Nitrogen Dioxide, Two dimensional materials

    Received: 09 Jun 2024; Accepted: 12 Jul 2024.

    Copyright: © 2024 Cheng, Huang, Xing, Yang, Yu and Zhong. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Yongchun Zhong, Jinan University, Guangzhou, China

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.