Figure 1.
Overlap of diffuse reflectance spectra of a undoped TiO
2
(P25) and b TiO
2-
x
N
y
and c emission spectrum of CaAl
2
O
4
:(Eu, Nd)
.
Li
et al.
Nanoscale Res Lett
2011
6
:5 doi:10.1007/s11671-010-9750-7