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    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/043/0061

    • Keywords

       

      Carbon nanotubes; polyethylenimine (PEI); sensor; NO$_2$.

    • Abstract

       

      Chemical detection of toxic gases, such as greenhouse gases is still very important as a research topic. To design gas sensor detectors based on single-walled carbon nanotubes (SWCNTs) with high sensitivity and selectivity for the toxic environment is a continuous process. The aim is to detect NO$_2$ gas with better sensitivity. In the present work, the thin-film sensor is fabricated on SiO$_2$ substrate and it is functionalized with polyethylenimine (PEI). It has been established that PEI functionalized SWCNTs (F-SWCNTs) show high sensitivity towards strong electron-withdrawing particles. It was found that at room temperature, SWCNTs-PEI functionalized gas sensor exhibited a higher sensitivity of 37.00% as compared with bare SWCNTs gas sensor. The gas sensor has shown the repeatable response for the entire concentration range studied.The sensing properties and the PEI functionalization duration effects on the behaviour of SWCNTs-based gas sensors were demonstrated.

    • Author Affiliations

       

      SUNIL KUMAR1 2 VLADIMIR PAVELYEV1 PRABHASH MISHRA1 3 4 NISHANT TRIPATHI1

      1. Department of Nanoengineering, Samara National Research University, Samara 443086, Russia
      2. ISOM, E.T.S.I. Telecommunication, Universidad Politecnica de Madrid, Madrid 28040, Spain
      3. Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology (MIPT), Dolgoprudny 141700, Russia
      4. Centre for Nanoscience and Nanotechnology, Jamia Millia Islamia (Central University), New Delhi 110025, India

    • Dates

       
      Published
      10 February 2020
      Manuscript received
      3 July 2019
      Accepted
      17 November 2019
      Final version published online
      10 February 2020

  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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