title: Helicity-selective photoreaction of single-walled carbon nanotubes with organosulfur compounds in the presence of oxygen.
abstract: This report describes a helicity-selective photoreaction of single-walled carbon nanotubes (SWNTs) with disulfide in the presence of oxygen. The SWNTs were characterized using absorption, photoluminescence (PL), Raman, and X-ray photoelectron spectroscopy, scanning electron microscopy, and current-voltage (I-V) measurements. Results showed remarkable helicity-selective (metallic SWNTs/semiconducting SWNTs and diameter) functionalization of SWNTs. The reaction rate decreases in the order of metallic SWNTs > semiconducting SWNTs and small-diameter SWNTs > large-diameter SWNTs. Control experiments conducted under various experimental conditions and ESR and femtosecond laser flash photolysis measurements revealed that the helicity-selective reaction proceeds via a photoinduced electron transfer reaction. The PL and I-V measurements showed that the photoreaction is effective not only to control SWNT conductivity but also for the band gap modulation of semiconducting SWNTs.
authors.affiliation: Department of Chemistry, Tokyo Gakugei University, Tokyo 184-8501, Japan. ymaeda@u-gakugei.ac.jp
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Maeda
authors.forename: Junki
authors.initials: J
authors.lastname: Higo
authors.forename: Yuri
authors.initials: Y
authors.lastname: Amagai
authors.forename: Jun
authors.initials: J
authors.lastname: Matsui
authors.forename: Kei
authors.initials: K
authors.lastname: Ohkubo
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Yoshigoe
authors.forename: Masahiro
authors.initials: M
authors.lastname: Hashimoto
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Eguchi
authors.forename: Michio
authors.initials: M
authors.lastname: Yamada
authors.forename: Tadashi
authors.initials: T
authors.lastname: Hasegawa
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Sato
authors.forename: Jing
authors.initials: J
authors.lastname: Zhou
authors.forename: Jing
authors.initials: J
authors.lastname: Lu
authors.forename: Tokuji
authors.initials: T
authors.lastname: Miyashita
authors.forename: Shunichi
authors.initials: S
authors.lastname: Fukuzumi
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Murakami
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Tohji
authors.forename: Shigeru
authors.initials: S
authors.lastname: Nagase
authors.forename: Takeshi
authors.initials: T
authors.lastname: Akasaka
mesh_terms: D004220:Disulfides; D004578:Electron Spin Resonance Spectroscopy; D007700:Kinetics; D007834:Lasers; D049449:Luminescence; D008855:Microscopy, Electron, Scanning; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry*; D010777:Photochemistry; D056951:Photoelectron Spectroscopy; D010782:Photolysis; D012666:Semiconductors; D013059:Spectrum Analysis, Raman; D013457:Sulfur Compounds / Q000737:chemistry*
chemical_list: D004220:Disulfides; D037742:Nanotubes, Carbon; D013457:Sulfur Compounds; D010100:Oxygen