Electron transport behavior of individual zinc oxide coated single-walled carbon nanotubes.
Uniform zinc oxide coated single-walled nanotubes (SWNTs) were fabricated by ultrasonic irradiation with acid-treated SWNTs, zinc acetate, and triethanolamine at low temperature in aqueous phase processing. The ZnO coating process did not decrease the dark current of the SWNTs, but a real decrease in the steady state negative photocurrent was observed after ZnO coating, suggesting a clear photosensitization effect. Transport measurements reveal that the negative photocurrent in s (semiconducting)-SWNTs@ZnO could be described by electron-hole compensation behavior attributed to the ZnO layer under ultraviolet excitation. This simple coating method for one-dimensional material can open up new possibilities for multifunctional nanodevices.
Lin
Chin-Ching
CC
Material and Chemical Research Laboratories, Industrial Technology Research Institute, 310 Chutung, Taiwan.
Chu
Bryan T T
BT
Tobias
Gerard
G
Sahakalkan
Serhat
S
Roth
Siegmar
S
Green
Malcolm L H
ML
Chen
San-Yuan
SY
D004553:Electric Conductivity; D004579:Electron Transport / Q000528:radiation effects; D008027:Light; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000528:radiation effects*; D036103:Nanotechnology / Q000379:methods*; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000528:radiation effects; D010316:Particle Size; D012666:Semiconductors; D015034:Zinc Oxide / Q000737:chemistry* / Q000528:radiation effects
D037742:Nanotubes, Carbon; D015034:Zinc Oxide