title: Differentiation of chemical reaction activity of various carbon nanotubes using redox potential: Classification by physical and chemical structures.
abstract: The present study systematically examined the kinetics of a hydroxyl radical scavenging reaction of various carbon nanotubes (CNTs) including double-walled and multi-walled carbon nanotubes (DWCNTs and MWCNTs), and carbon nano peapods (AuCl3@DWCNT). The theoretical model that we recently proposed based on the redox potential of CNTs was used to analyze the experimental results. The reaction kinetics for DWCNTs and thin MWCNTs agreed well with the theoretical model and was consistent with each other. On the other hand, thin and thick MWCNTs behaved differently, which was consistent with the theory. Additionally, surface morphology of CNTs substantially influenced the reaction kinetics, while the doped particles in the center hollow parts of CNTs (AuCl3@DWCNT) shifted the redox potential in a different direction. These findings make it possible to predict the chemical and biological reactivity of CNTs based on the structural and chemical nature and their influence on the redox potential.
authors.affiliation: Aquatic Innovation Center, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan.
authors.forename: Shuji
authors.initials: S
authors.lastname: Tsuruoka
authors.affiliation: Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552, Japan.
authors.forename: Hidetoshi
authors.initials: H
authors.lastname: Matsumoto
authors.affiliation: West Virginia University, Morgantown, WV, USA.
authors.forename: Vincent
authors.initials: V
authors.lastname: Castranova
authors.affiliation: Pathology & Physiology Research Branch, National Institute for Occupational Safety and Health, 1095 Willowdale Rd. (M/S2015), Morgantown, WV, USA.
authors.forename: Dale W
authors.initials: DW
authors.lastname: Porter
authors.affiliation: GSI Creos Corporation, 1-12, Minami-Watarida-cho, Kawasaki, Kanagawa 210-0855, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Yanagisawa
authors.affiliation: Department of Applied Physical Therapy, Shinshu University, School of Health Sciences, 3-1-1 Asahi, Matsumoto, Nagano, Japan.
authors.forename: Naoto
authors.initials: N
authors.lastname: Saito
authors.affiliation: Department of Applied Physical Therapy, Shinshu University, School of Health Sciences, 3-1-1 Asahi, Matsumoto, Nagano, Japan.
authors.forename: Shinsuke
authors.initials: S
authors.lastname: Kobayashi
authors.affiliation: Institute of Carbon Science and Technology, Shinshu University, Nagano 380-8553, Japan.
authors.forename: Morinobu
authors.initials: M
authors.lastname: Endo