Thermal conversion of electronic and electrical properties of AuCl3-doped single-walled carbon nanotubes.
By using carbon-free inorganic atomic layer involving heat treatment from 150 to 300 °C, environmentally stable and permanent modulation of the electronic and electrical properties of single-walled carbon nanotubes (SWCNTs) from p-type to ambi-polar and possibly to n-type has been demonstrated. At low heat treatment temperature, a strong p-doping effect from Au(3+) ions to CNTs due to a large difference in reduction potential between them is dominant. However at higher temperature, the gold species are thermally reduced, and thermally induced CNT-Cl finally occurs by the decomposition reaction of AuCl(3). Thus, in the AuCl(3)-doped SWCNTs treated at higher temperature, the p-type doping effect is suppressed and an n-type property from CNT-Cl is thermally induced. Thermal conversion of the majority carrier type of AuCl(3)-doped SWNTs is systematically investigated by combining various optical and electrical tools.
Samsung Advanced Institute of Technology, Yongin, Gyeonggi-do 446-71, Korea.
Seon-Mi
SM
Yoon
Un Jeong
UJ
Kim
Anass
A
Benayad
Il Ha
IH
Lee
Hyungbin
H
Son
Hyeon-Jin
HJ
Shin
Won Mook
WM
Choi
Young Hee
YH
Lee
Yong Wan
YW
Jin
Eun-Hong
EH
Lee
Sang Yoon
SY
Lee
Jae-Young
JY
Choi
Jong Min
JM
Kim