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.

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