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Chemical sensing with switchable transport channels in graphene grain boundaries

Author

Listed:
  • Poya Yasaei

    (University of Illinois at Chicago)

  • Bijandra Kumar

    (University of Illinois at Chicago)

  • Reza Hantehzadeh

    (University of Illinois at Chicago)

  • Morteza Kayyalha

    (Birck Nanotechnology Center and School of Electrical and Computer Engineering, Purdue University)

  • Artem Baskin

    (University of Illinois at Chicago)

  • Nikita Repnin

    (University of Illinois at Chicago)

  • Canhui Wang

    (University of Illinois at Chicago)

  • Robert F. Klie

    (University of Illinois at Chicago)

  • Yong P. Chen

    (Birck Nanotechnology Center and School of Electrical and Computer Engineering, Purdue University
    Purdue University)

  • Petr Král

    (University of Illinois at Chicago
    University of Illinois at Chicago)

  • Amin Salehi-Khojin

    (University of Illinois at Chicago)

Abstract

Grain boundaries can markedly affect the electronic, thermal, mechanical and optical properties of a polycrystalline graphene. While in many applications the presence of grain boundaries in graphene is undesired, here we show that they have an ideal structure for the detection of chemical analytes. We observe that an isolated graphene grain boundary has ~300 times higher sensitivity to the adsorbed gas molecules than a single-crystalline graphene grain. Our electronic structure and transport modelling reveal that the ultra-sensitivity in grain boundaries is caused by a synergetic combination of gas molecules accumulation at the grain boundary, together with the existence of a sharp onset energy in the transmission spectrum of its conduction channels. The discovered sensing platform opens up new pathways for the design of nanometre-scale highly sensitive chemical detectors.

Suggested Citation

  • Poya Yasaei & Bijandra Kumar & Reza Hantehzadeh & Morteza Kayyalha & Artem Baskin & Nikita Repnin & Canhui Wang & Robert F. Klie & Yong P. Chen & Petr Král & Amin Salehi-Khojin, 2014. "Chemical sensing with switchable transport channels in graphene grain boundaries," Nature Communications, Nature, vol. 5(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms5911
    DOI: 10.1038/ncomms5911
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    Cited by:

    1. Yiming Song & Xiang Gao & Rémy Pawlak & Shuyu Huang & Antoine Hinaut & Thilo Glatzel & Oded Hod & Michael Urbakh & Ernst Meyer, 2024. "Non-Amontons frictional behaviors of grain boundaries at layered material interfaces," Nature Communications, Nature, vol. 15(1), pages 1-8, December.

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