Oxygen desorption from single-walled carbon nanotubes by camera flash.
In this paper, we report that the electrical conductance of single-walled carbon nanotubes networks decreases when the nanotubes are illuminated by camera flash in high vacuum up to 10(-6) Torr. The decreasing conductance shows step-like characteristics at each illumination. The magnitude of conductance change step reduces gradually after each illumination; finally, the conductance reaches saturation. Controlled experiments in air, oxygen and nitrogen gas indicate that mechanism for these observations is photodesorption of molecular oxygen from singled-walled carbon nanotubes.
Liu
Zheng
Z
National Center for Nanoscience and Technology of China, Beijing 100080, China.
Liu
Guangtong
G
Zhao
Yuanchun
Y
Zheng
Kaihong
K
Huang
Haibo
H
Yang
Yanlian
Y
Wang
Chen
C
Gu
Changzhi
C
Xie
Sishen
S
Sun
Lianfeng
L