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Advanced Materials

Graphene Sensors: Polycrystalline Graphene Ribbons as Chemiresistors (Adv. Mater. 1/2012)

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 are presented by Richard I. Masel and co-workers on page 53. The image shows polycrystalline graphene ribbon chemiresistors with gold contacts visualizing linear defects or wrinkles in the graphene. Floating or attached toluene molecules act as electron donors. Such defective graphene devices exhibit a higher chemical sensitivity than pristine graphene or carbon nanotube chemire-sistors. (Image by Alex Jerez, Beckman Institute, University of Illinois at Urbana-Champaign.)

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