lumophores produced are highly stable and made from nontoxic constituents,
because their luminescence originates in the oxide/polymer interface the variability
of emission colors is limited. Therefore, an additional design of luminescent
nanocomposites consisting of a ceramic core, a layer of an organic lumophore,
and a polymer coating at the outside was developed. The design of these composites
is shown schematically in Figure 9.42.
450
500
550
600
650
700
750
emission wavelength [nm]
luminescence
intensity
[a.u.]
ZrO 2 doped with
2% Dy
7% Eu
Figure 9.41 Luminescence spectra of rear earth doped zirconia. Doping was made with
dysprosium [34] or europium [35]. One realized the broad range of possibilities to alter the
emission spectrum.
Figure 9.42 Luminescent nanocomposites,
consisting of a ceramic core, a lumophore layer,
and a polymer coating at the outside [12,18].
The ceramic core may be selected according to
the desired properties, to add physical
properties (besides luminescence) to the
particle. The polymer coating at the outer
surface is selected according to demands, and
based on interaction with the outside world.
244j 9 Optical Properties of Nanoparticles