Selective oxidation on metallic carbon nanotubes by halogen oxoanions.
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.
Yoon
Seon-Mi
SM
Display Device & Processing Lab and Analytical Engineering Center, Samsung Advanced Institute of Technology, Post Office Box 111, Suwon 440-600, Korea.
Kim
Sung Jin
SJ
Shin
Hyeon-Jin
HJ
Benayad
Anass
A
Choi
Seong Jae
SJ
Kim
Ki Kang
KK
Kim
Soo Min
SM
Park
Yong Jin
YJ
Kim
Gunn
G
Choi
Jae-Young
JY
Lee
Young Hee
YH