High yield assembly and transport properties of semiconducting carbon nanotubes

POSTER

Abstract

AC-dielectrophoresis (DEP) typically yields a low percentage of semiconducting single-walled nanotube (SWNT) devices due to the greater force metallic SWNTs feel during the trapping process. Here we show that DEP combined with a commercially available semiconducting enriched solution allows for the large scale assembly of SWNT field effect transistors (FETs) from solution. Individual or small bundle SWNTs we assembled between 1 um spaced Pd source and drain electrodes using DEP. We observed FET behavior in 87{\%} of the as-assembled devices using this fabrication method. After annealing in Ar/H$_{2}$ gas, the devices displayed mobilities up to 463 cm$^{2}$/Vs and current on-off ratios as large as 4x10$^{5}$. We will present scanning electron micrographs, full electronic characteristics, and statistics on the FET devices.

*This work is partially supported by NSF-CARRER award ECS-0748091.

Authors

  • Eliot Silbar

    • Univ. of Central Florida, Nanoscience Technology Center and Dept. of Physics
    • University of Central Florida, Nanoscience Technology Center and Department of Physics

  • Kristy Kormondy

    • Univ. of Central Florida, Nanoscience Technology Center and Dept. of Physics
    • University of Central Florida, Nanoscience Technology Center and Department of Physics

  • Paul Stokes

    • University of Central Florida Nanoscience Technology Center and Dept. of Physics
    • Univ. of Central Florida, Nanoscience Technology Center and Dept. of Physics
    • University of Central Florida, Nanoscience Technology Center and Department of Physics

  • Saiful I. Khondaker

    • University of Central Florida Nanoscience Technology Center and Dept. of Physics
    • Department of Physics \& Nanoscience Technology Center, University of Central Florida, Orlando, Florida 32826, USA.
    • Univ. of Central Florida, Nanoscience Technology Center and Dept. of Physics
    • University of Central Florida
    • University of Central Florida, Nanoscience Technology Center and Department of Physics
    • Univ.of Central Florida, Nanoscience Technology Center and Dept. of Physics