Synthesis of Luminescent Ink from Europium-Doped Y2O3 Dispersed in Polyvinyl Alcohol Solution
Figure 8
Stable colloid of Y2O3:Eu without UV illumination (a) and when illuminated with UV of wavelength 254 nm (b). Example of writing result using stable luminescent colloid: (c) without illumination with UV and (d) under UV illumination.