title: Tuning the electrical property of a single layer graphene nanoribbon by adsorption of planar molecular nanoparticles.
abstract: In this study, a simple and fast approach of band gap formation in a single layer graphene nanoribbon (sGNR) is demonstrated by using hexaazatriphenylenehexacarbonitrile (HAT-CN6) as an adsorbate molecule. sGNRs were successfully synthesized through the unzipping of double-walled carbon nanotubes followed by casting HAT-CN6in acetone solution to alter the electronic properties of the sGNRs. Then, the electrical property of a sGNR was measured using a field effect transistor structure and also by point-contact current imaging atomic force microscopy. The results demonstrate the formation of electron trapping sites with the nanoparticles and the neck structure of the sGNR near the adsorbed region of the molecule. Therefore, the charge carriers on the sGNR can only pass through the neck region, which works similarly to a narrow sGNR. Such a narrow sGNR has a lateral confinement of charge carriers around the neck region; hence, the device becomes semiconducting. The fabricated semiconducting sGNR could be widely used in electronic devices.
authors.affiliation: Department of Human Intelligence Systems, Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, 2-4 Hibikino Wakamatsu, Kitakyushu 808-0196, Japan.
authors.forename: Reetu Raj
authors.initials: RR
authors.lastname: Pandey
authors.forename: Minoru
authors.initials: M
authors.lastname: Fukumori
authors.forename: Amin
authors.initials: A
authors.lastname: TermehYousefi
authors.forename: Masanori
authors.initials: M
authors.lastname: Eguchi
authors.forename: Daisuke
authors.initials: D
authors.lastname: Tanaka
authors.forename: Takuji
authors.initials: T
authors.lastname: Ogawa
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Tanaka