title: Controllable redox reaction of chemically purified DNA-single walled carbon nanotube hybrids with hydrogen peroxide.
abstract: We report for the first time the controllable redox reaction of chemically purified ssDNA-HiPco SWNT hybrids with hydrogen peroxide. Compared with the suspensions before separation, the purified SWNT suspensions become inert with hydrogen peroxide which may serve as a platform for further chemical manipulation. In the presence of thiocyanate ions, the reaction of SWNTs with hydrogen peroxide is initiated and accelerated at the earlier reaction stage, accompanied with the near-infrared spectral suppression. At the later stage, the suppressed spectral intensity is recovered overtime. The thiocyanate ions may work as a mediator being able to control the reaction rate as well as the tunable properties of the reaction. The tunable redox reaction of SWNTs and H2O2 mediated by thiocyanate ions may offer a new sensing scheme for continuously monitoring H2O2 concentrations.
authors.affiliation: Department of Chemistry, University of Arkansas, 2801 South University Avenue, Little Rock, Arkansas 72204, USA.
authors.forename: Yang
authors.initials: Y
authors.lastname: Xu
authors.forename: Pehr E
authors.initials: PE
authors.lastname: Pehrsson
authors.forename: Liwei
authors.initials: L
authors.lastname: Chen
authors.forename: Wei
authors.initials: W
authors.lastname: Zhao
mesh_terms: D004277:DNA, Single-Stranded / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007700:Kinetics; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010084:Oxidation-Reduction; D013055:Spectrophotometry, Infrared; D013861:Thiocyanates
chemical_list: D004277:DNA, Single-Stranded; D037742:Nanotubes, Carbon; D013861:Thiocyanates; D006861:Hydrogen Peroxide; C031760:thiocyanate