Electric characteristics of multi-walled carbon nanotubes irradiated with highly charged ions. (13th June 2019)

• Record Type: Journal Article
• Authors: Nishida, Naofumi; Hori, Yuki; Sakurai, Makoto; Fujiwara, Yuya; Honda, Shin-ichi; Terasawa, Mititaka; Yamaguchi, Tomohiro; Ishibashi, Koji; Izumi, Hirokazu
• Is Part Of: Japanese journal of applied physics. Volume 58:Number SI(2019)
• Publication Date: 2019-06-13
• Subjects: Physics -- Periodicals; 621.05
• DOI: 10.7567/1347-4065/ab1b60
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: The electric characteristics of individual multi-wall carbon nanotubes (MWNTs) irradiated with highly charged ions were evaluated. Each MWNT was located on a highly doped Si substrate with a source/drain contact, forming a back-gate FET configuration. We used highly charged Ar ions (Ar 8+, Ar 11+, and Ar 14+ ) extracted from an electron beam ion source. We measured the current–voltage curves of the MWNTs irradiated at fluences in the 10 11 –10 13 cm −2 range. The Ar 8+ irradiation caused a 10% increase in the resistivity at room temperature at a fluence of 6 × 10 11 cm −2 . The resistivity at room temperature for the MWNT samples with a high fluence of 10 13 cm −2 reached values higher than five times the original values. The current–voltage characteristics at low temperature became nonlinear and Coulomb oscillations were observed in the gate voltage dependence of the drain current. One of the samples exhibited Coulomb diamond characteristics particular to single quantum dot at 1.6 K.