title: Reversible surface oxidation and efficient luminescence quenching in semiconductor single-wall carbon nanotubes.
abstract: We have investigated reversible single-wall carbon nanotube (SWNT) oxidation by quantitative analysis of the oxide-induced absorption bleaching and luminescence quenching at low pH. These data, in combination with DFT structure calculations, suggest that the nanotube oxide is a 1,4-endoperoxide. At low pH, the endoperoxide protonates to create a hydroperoxide carbocation, introducing a hole in the SWNT valence band. Nanotube luminescence is extremely sensitive to quenching by hole-doping, while the absorption is relatively robust.
authors.affiliation: Department of Chemistry, Columbia University, 3000 Broadway, New York, New York 10027, USA.
authors.forename: Gordana
authors.initials: G
authors.lastname: Dukovic
authors.forename: Brian E
authors.initials: BE
authors.lastname: White
authors.forename: Zhiyong
authors.initials: Z
authors.lastname: Zhou
authors.forename: Feng
authors.initials: F
authors.lastname: Wang
authors.forename: Steffen
authors.initials: S
authors.lastname: Jockusch
authors.forename: Michael L
authors.initials: ML
authors.lastname: Steigerwald
authors.forename: Tony F
authors.initials: TF
authors.lastname: Heinz
authors.forename: Richard A
authors.initials: RA
authors.lastname: Friesner
authors.forename: Nicholas J
authors.initials: NJ
authors.lastname: Turro
authors.forename: Louis E
authors.initials: LE
authors.lastname: Brus