title: Aqueous nanosilica dispersants for carbon nanotube.
abstract: Nanosilicas can disperse single-wall carbon nanotube (SWCNT) in aqueous solution efficiently; SWCNTs are stably dispersed in aqueous media for more than 6 months. The SWCNT dispersing solution with nanosilica can produce highly conductive transparent films which satisfy the requirements for application to touch panels. Even multiwall carbon nanotube can be dispersed easily in aqueous solution. The highly stable dispersion of SWCNTs in the presence of nanosilica is associated with charge transfer interaction which generates effective charges on the SWCNT particles, giving rise to electrostatic repulsion between the SWCNTs in the aqueous solution. Adhesion of charged nanosilicas on SWCNTs in the aqueous solution and a marked depression of the S11 peak of optical absorption spectrum of the SWCNT with nanosilicas suggest charge transfer interaction of nanosilicas with SWCNT. Thus-formed isolated SWCNTs are fixed on the flexible three-dimensional silica jelly structure in the aqueous solution, leading to the uniform and stable dispersion of SWCNTs.
authors.affiliation: †Technical Center, Fuji Chemical Co., Ltd., Nakatsugawa 509-9132, Japan.
authors.forename: Takafumi
authors.initials: T
authors.lastname: Matsuda
authors.affiliation: ‡Center for Energy and Environmental Science, Shinshu University, Nagano 380-8553, Japan.
authors.forename: Daiki
authors.initials: D
authors.lastname: Minami
authors.affiliation: ‡Center for Energy and Environmental Science, Shinshu University, Nagano 380-8553, Japan.|§Department of Chemistry, Indonesia University of Education, Bandung 40154, Indonesia.
authors.forename: Fitri
authors.initials: F
authors.lastname: Khoerunnisa
authors.affiliation: †Technical Center, Fuji Chemical Co., Ltd., Nakatsugawa 509-9132, Japan.
authors.forename: Motoo
authors.initials: M
authors.lastname: Sunaga
authors.affiliation: ∥Department of Mechanical Systems Engineering, Tokyo University of Science, Suwa, Chino 391-0292, Japan.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Nakamura
authors.affiliation: ∥Department of Mechanical Systems Engineering, Tokyo University of Science, Suwa, Chino 391-0292, Japan.
authors.forename: Shigenori
authors.initials: S
authors.lastname: Utsumi
authors.affiliation: ⊥Center for Chemical Analysis, Chiba University, Inage, Chiba 263-8522, Japan.
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Itoh
authors.affiliation: †Technical Center, Fuji Chemical Co., Ltd., Nakatsugawa 509-9132, Japan.
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Fujimori
authors.forename: Takuya
authors.initials: T
authors.lastname: Hayashi
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Hattori
authors.forename: Morinobu
authors.initials: M
authors.lastname: Endo
authors.affiliation: †Technical Center, Fuji Chemical Co., Ltd., Nakatsugawa 509-9132, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Isobe
authors.affiliation: †Technical Center, Fuji Chemical Co., Ltd., Nakatsugawa 509-9132, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Onodera
authors.affiliation: ‡Center for Energy and Environmental Science, Shinshu University, Nagano 380-8553, Japan.
authors.forename: Katsumi
authors.initials: K
authors.lastname: Kaneko