Ubiquitous organic molecule-based free-standing nanowires with ultra-high aspect ratios

Koshi Kamiya, Kazuto Kayama, Masaki Nobuoka, Shugo Sakaguchi, Tsuneaki Sakurai (), Minori Kawata, Yusuke Tsutsui, Masayuki Suda, Akira Idesaki, Hiroshi Koshikawa, Masaki Sugimoto, G. B. V. S. Lakshmi, D. K. Avasthi and Shu Seki ()
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Koshi Kamiya: Kyoto University
Kazuto Kayama: Kyoto University
Masaki Nobuoka: Kyoto University
Shugo Sakaguchi: Kyoto University
Tsuneaki Sakurai: Kyoto University
Minori Kawata: Kyoto University
Yusuke Tsutsui: Kyoto University
Masayuki Suda: Kyoto University
Akira Idesaki: Takasaki Advanced Radiation Research Institute, National Institutes for Quantum and Radiological Science and Technology
Hiroshi Koshikawa: Takasaki Advanced Radiation Research Institute, National Institutes for Quantum and Radiological Science and Technology
Masaki Sugimoto: Takasaki Advanced Radiation Research Institute, National Institutes for Quantum and Radiological Science and Technology
G. B. V. S. Lakshmi: Jawaharlal Nehru University
D. K. Avasthi: University of Petroleum and Energy Studies
Shu Seki: Kyoto University

Nature Communications, 2021, vol. 12, issue 1, 1-11

Abstract: Abstract The critical dimension of semiconductor devices is approaching the single-nm regime, and a variety of practical devices of this scale are targeted for production. Planar structures of nano-devices are still the center of fabrication techniques, which limit further integration of devices into a chip. Extension into 3D space is a promising strategy for future; however, the surface interaction in 3D nanospace make it hard to integrate nanostructures with ultrahigh aspect ratios. Here we report a unique technique using high-energy charged particles to produce free-standing 1D organic nanostructures with high aspect ratios over 100 and controlled number density. Along the straight trajectory of particles penetrating the films of various sublimable organic molecules, 1D nanowires were formed with approximately 10~15 nm thickness and controlled length. An all-dry process was developed to isolate the nanowires, and planar or coaxial heterojunction structures were built into the nanowires. Electrical and structural functions of the developed standing nanowire arrays were investigated, demonstrating the potential of the present ultrathin organic nanowire systems.

Date: 2021
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DOI: 10.1038/s41467-021-24335-x

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