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.
Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany. yangyang@mpi-halle.de
Yang
Y
Yang
Dong Sik
DS
Kim
Yong
Y
Qin
Andreas
A
Berger
Roland
R
Scholz
Hyunbin
H
Kim
Mato
M
Knez
Ulrich
U
Gösele