Jump to main content
Jump to site search

Issue 14, 2019
Previous Article Next Article

A sub 20 nm metal-conjugated molecule junction acting as a nitrogen dioxide sensor

Author affiliations

Abstract

The interaction of a gas molecule with a sensing material causes the highest change in the electronic structure of the latter, when this material consists of only a few atoms. If the sensing material consists of a short, conductive molecule, the sensing action can be furthermore probed by connecting such molecules to nanoelectrodes. Here, we report that NO2 molecules that adhere to 4,4′-biphenyldithiol (BPDT) bound to Au surfaces lead to a change of the electrical transmission of the BPDT. The related device shows reproducible, stable measurements and is so far the smallest (<20 nm) gas sensor. It demonstrates modulation of charge transport through molecules upon exposure to nitrogen dioxide down to concentrations of 55 ppb. We have evaluated several devices and exposure conditions and obtained a close to linear dependence of the sensor response on the gas concentration.

Graphical abstract: A sub 20 nm metal-conjugated molecule junction acting as a nitrogen dioxide sensor

Back to tab navigation

Supplementary files

Publication details

The article was received on 17 Oct 2018, accepted on 01 Mar 2019 and first published on 18 Mar 2019


Article type: Communication
DOI: 10.1039/C8NR08417C
Nanoscale, 2019,11, 6571-6575
  • Open access: Creative Commons BY-NC license
  •   Request permissions

    A sub 20 nm metal-conjugated molecule junction acting as a nitrogen dioxide sensor

    I. H. Wani, S. H. M. Jafri, J. Warna, A. Hayat, H. Li, V. A. Shukla, A. Orthaber, A. Grigoriev, R. Ahuja and K. Leifer, Nanoscale, 2019, 11, 6571
    DOI: 10.1039/C8NR08417C

    This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author

Spotlight

Advertisements