Unexpected long-term instability of ZnO nanowires "protected" by a TiO2 shell.
We revealed the aggravated instability of (0001)-oriented ZnO nanowires when they were deposited by a TiO(2) shell even under ambient conditions. Trace UV photons from daylight and moisture from air, which generally have negligible effects on "bare" ZnO nanowires, can obviously enhance their photocorrosion due to the high bandgap of TiO(2) as well as this conformal core-shell heterostructure.
Yang
Yang
Y
Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany. yangyang@mpi-halle.de
Kim
Dong Sik
DS
Qin
Yong
Y
Berger
Andreas
A
Scholz
Roland
R
Kim
Hyunbin
H
Knez
Mato
M
Gösele
Ulrich
U