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Monolayer-Dimensional 5,5′-Bis(4-hexylphenyl)-2,2′-bithiophene Transistors and Chemically Responsive Heterostructures

Authors

  • Jia Huang,

    1. Department of Materials Science and Engineering Johns Hopkins University 102 Maryland Hall, 3400 N. Charles Street, Baltimore, MD 21218 (USA)
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  • Jia Sun,

    1. Department of Materials Science and Engineering Johns Hopkins University 102 Maryland Hall, 3400 N. Charles Street, Baltimore, MD 21218 (USA)
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  • Howard E. Katz

    Corresponding author
    1. Department of Materials Science and Engineering Johns Hopkins University 102 Maryland Hall, 3400 N. Charles Street, Baltimore, MD 21218 (USA)
    • Department of Materials Science and Engineering Johns Hopkins University 102 Maryland Hall, 3400 N. Charles Street, Baltimore, MD 21218 (USA).
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  • This work was performed with primary support from the National Science Foundation SENSORS program (Award #0528472). Support from NSF Award CBET 0730926 is also acknowledged. We thank Professor Peter Searson for access to and assistance with AFM instrumentation, and Dr. Alan Becknell (Applied Physics Laboratories) for calibration of DMMP concentrations. Supporting Information is available online from Wiley InterScience or from the authors.

Abstract

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The organic semiconductor 5,5′-Bis(4- hexylphenyl)-2,2′-bithiophene (6PTTP6) shows a remarkable 2D growth mechanism. Without requiring a complicated fabrication process, organic field-effect transistors (OFETs) with only a 1.5 monolayer 6PTTP6 film show mobilities close to those of conventional thick OFETs. Our heterostructured OFET blend exhibits a much faster response speed and a higher sensitivity to nerve-agent simulants than thicker OFET analogues.

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