Tunable carbon nanotube diode with varying asymmetric geometry

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  • Keita Funayama
    Toyota Central Research and Development Laboratories, Inc. 1 , Nagakute 480-1192, Japan
  • Jun Hirotani
    Department of Electronics, Nagoya University 2 , Nagoya 464-8603, Japan
  • Atsushi Miura
    Toyota Central Research and Development Laboratories, Inc. 1 , Nagakute 480-1192, Japan
  • Hiroya Tanaka
    Toyota Central Research and Development Laboratories, Inc. 1 , Nagakute 480-1192, Japan
  • Yutaka Ohno
    Department of Electronics, Nagoya University 2 , Nagoya 464-8603, Japan
  • Yukihiro Tadokoro
    Toyota Central Research and Development Laboratories, Inc. 1 , Nagakute 480-1192, Japan

Description

<jats:p>We propose and demonstrate a carbon nanotube (CNT)-based field emission nanoscale diode to realize a fully integrated nanoscale system, namely, a true nanosystem. To the best of our knowledge, this is the first time a nanodiode simultaneously achieves ease of fabrication and individual tunability of multiple CNT diodes on the nanoscale on the same substrate in a one-time process. A nanodiode comprises a single-wall CNT cathode placed on a substrate, layered insulator, and metal anode. The proposed nanodiode allows us to adjust the turn-on voltage from 1 to 2.4 V by varying the surface area of the anode. Furthermore, as an example of a basic nano-electronic system, nanodiode-based fundamental logic gates (OR and NAND) are demonstrated on a CNT. We propose a theoretical model that derives the theoretical I–V characteristics based on the image-charge method to design the nanodiode quickly. The results in this study contribute to the development of carbon-based nanoelectronic systems.</jats:p>

Journal

  • AIP Advances

    AIP Advances 11 (7), 2021-07-01

    AIP Publishing

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