Journal of Electronic Materials

, Volume 35, Issue 1, pp 170–172 | Cite as

Ultrathin CdSe nanowire field-effect transistors

  • Anubhav Khandelwal
  • Debdeep Jena
  • James W. Grebinski
  • Katherine Leigh Hull
  • Masaru K. Kuno


We report the fabrication, and electrical and optical characterization, of solution-liquid-solid (SLS) grown CdSe nanowire field-effect transistors. Ultrathin nanowires (7–12 nm diameters) with lengths between 1 µm and 10 µm were grown by the SLS technique. Al-CdSe-Al junctions are then defined over oxidized Si substrate using photolithography. The nanowires, which were very resistive in the dark, showed pronounced photoconductivity even with a visible light source with resistance decreasing by a factor of 2–100 for different devices. Field-effect devices fabricated by a global backgating technique showed threshold voltages between −7.5 V and −2.5 V and on-to-off channel current ratios between 103 and 106 at room temperature. Channel current modulation with gate voltage is observed with the current turning off for negative gate bias, suggesting unintentional n-type doping. Further, optical illumination resulted in the loss of gate control over the channel current of the field-effect transistor.

Key words

CdSe nanowire field-effect transistor 


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Copyright information

© TMS-The Minerals, Metals and Materials Society 2006

Authors and Affiliations

  • Anubhav Khandelwal
    • 1
  • Debdeep Jena
    • 1
  • James W. Grebinski
    • 2
  • Katherine Leigh Hull
    • 2
  • Masaru K. Kuno
    • 2
  1. 1.Department of Electrical EngineeringUniversity of Notre DameNotre Dame
  2. 2.Department of Chemistry & BiochemistryUniversity of Notre DameUSA

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