title: Electrical transport properties of small diameter single-walled carbon nanotubes aligned on ST-cut quartz substrates.
abstract: A method is introduced to isolate and measure the electrical transport properties of individual single-walled carbon nanotubes (SWNTs) aligned on an ST-cut quartz, from room temperature down to 2 K. The diameter and chirality of the measured SWNTs are accurately defined from Raman spectroscopy and atomic force microscopy (AFM). A significant up-shift in the G-band of the resonance Raman spectra of the SWNTs is observed, which increases with increasing SWNTs diameter, and indicates a strong interaction with the quartz substrate. A semiconducting SWNT, with diameter 0.84 nm, shows Tomonaga-Luttinger liquid and Coulomb blockade behaviors at low temperatures. Another semiconducting SWNT, with a thinner diameter of 0.68 nm, exhibits a transition from the semiconducting state to an insulating state at low temperatures. These results elucidate some of the electrical properties of SWNTs in this unique configuration and help pave the way towards prospective device applications.
authors.affiliation: National Institute for Materials Science, 1-2-1, Sengen, Tsukuba, Ibaraki 305-0047, Japan.
authors.forename: Tohru
authors.initials: T
authors.lastname: Watanabe
authors.affiliation: Physics Department, College of Science, United Arab Emirates University, Al Ain, Abu Dhabi, United Arab Emirates.
authors.forename: El-Hadi S
authors.initials: el-HS
authors.lastname: Sadki
authors.affiliation: National Institute for Materials Science, 1-2-1, Sengen, Tsukuba, Ibaraki 305-0047, Japan.
authors.forename: Takahide
authors.initials: T
authors.lastname: Yamaguchi
authors.affiliation: National Institute for Materials Science, 1-2-1, Sengen, Tsukuba, Ibaraki 305-0047, Japan.
authors.forename: Yoshihiko
authors.initials: Y
authors.lastname: Takano
keywords: Coulomb blockade; Horizontally aligned; ST-cut quartz; Single-walled carbon nanotubes; Substrate interaction; Tomonaga-Luttinger liquid