title: Selective oxidation on metallic carbon nanotubes by halogen oxoanions.
abstract: Chlorine oxoanions with the chlorine atom at different oxidation states were introduced in an attempt to systematically tailor the electronic structures of single-walled carbon nanotubes (SWCNTs). The degree of selective oxidation was controlled systematically by the different oxidation state of the chlorine oxoanion. Selective suppression of the metallic SWCNTs with a minimal effect on the semiconducting SWCNTs was observed at a high oxidation state. The adsorption behavior and charge transfer at a low oxidation state were in contrast to that observed at a high oxidation state. Density functional calculations demonstrated the chemisorption of chloro oxoanions at the low oxidation state and their physisorption at high oxidation states. These results concurred with the experimental observations from X-ray photoelectron spectroscopy. The sheet resistance of the SWCNT film decreased significantly at high oxidation states, which was explained in terms of a p-doping phenomenon that is controlled by the oxidation state.
authors.affiliation: Display Device & Processing Lab and Analytical Engineering Center, Samsung Advanced Institute of Technology, Post Office Box 111, Suwon 440-600, Korea.
authors.forename: Seon-Mi
authors.initials: SM
authors.lastname: Yoon
authors.forename: Sung Jin
authors.initials: SJ
authors.lastname: Kim
authors.forename: Hyeon-Jin
authors.initials: HJ
authors.lastname: Shin
authors.forename: Anass
authors.initials: A
authors.lastname: Benayad
authors.forename: Seong Jae
authors.initials: SJ
authors.lastname: Choi
authors.forename: Ki Kang
authors.initials: KK
authors.lastname: Kim
authors.forename: Soo Min
authors.initials: SM
authors.lastname: Kim
authors.forename: Yong Jin
authors.initials: YJ
authors.lastname: Park
authors.forename: Gunn
authors.initials: G
authors.lastname: Kim
authors.forename: Jae-Young
authors.initials: JY
authors.lastname: Choi
authors.forename: Young Hee
authors.initials: YH
authors.lastname: Lee