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Advanced Materials

Polycrystalline Graphene Ribbons as Chemiresistors

Authors

  • Amin Salehi-Khojin,

    1. Department of Chemical and Biomolecular Engineering, University Of Illinois at Urbana Champaign, USA
    2. Dioxide Materials, 60 Hazelwood Dr, Champaign IL 61820, USA
    Current affiliation:
    1. A.S.-K. and D.E. contributed equally to this work.
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  • David Estrada,

    1. Department of Electrical and Computer Engineering, University Of Illinois at Urbana Champaign, USA
    2. Micro and Nanotechnology Lab, University Of Illinois at Urbana Champaign, USA
    Current affiliation:
    1. A.S.-K. and D.E. contributed equally to this work.
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  • Kevin Y. Lin,

    1. Department of Chemical and Biomolecular Engineering, University Of Illinois at Urbana Champaign, USA
    Current affiliation:
    1. K.Y.L., M.-H.B., and F.X. contributed equally to this work.
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  • Myung-Ho Bae,

    1. Department of Electrical and Computer Engineering, University Of Illinois at Urbana Champaign, USA
    2. Micro and Nanotechnology Lab, University Of Illinois at Urbana Champaign, USA
    Current affiliation:
    1. K.Y.L., M.-H.B., and F.X. contributed equally to this work.
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  • Feng Xiong,

    1. Department of Electrical and Computer Engineering, University Of Illinois at Urbana Champaign, USA
    2. Micro and Nanotechnology Lab, University Of Illinois at Urbana Champaign, USA
    3. Beckman Institute, University Of Illinois at Urbana Champaign, USA
    Current affiliation:
    1. K.Y.L., M.-H.B., and F.X. contributed equally to this work.
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  • Eric Pop,

    1. Department of Electrical and Computer Engineering, University Of Illinois at Urbana Champaign, USA
    2. Micro and Nanotechnology Lab, University Of Illinois at Urbana Champaign, USA
    3. Beckman Institute, University Of Illinois at Urbana Champaign, USA
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  • Richard I. Masel

    Corresponding author
    1. Dioxide Materials, 60 Hazelwood Dr, Champaign IL 61820, USA
    • Dioxide Materials, 60 Hazelwood Dr, Champaign IL 61820, USA.
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Abstract

Polycrystalline graphene sensors easily obtained through chemical vapor deposition (CVD) have been developed for chemical sensing. We show that linear defects or continuous lines of point defects on these sensors result in significantly higher sensitivity than that of pristine graphene and carbon nanotube film sensors. Further sensitivity enhancement is obtained by cutting the graphene into ribbons of width comparable to the linear defect dimensions (micrometers).

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