Inkjet printable luminescent Eu3+-TiO2 doped in sol gel matrix for paper tagging.

Europium (III) with different concentrations (0.2, 0.4 and 0.8 %)-TiO(2) doped silica composite systems were sensitized by sol-gel method. Different spectroscopic and microscopic tools characterized the composites. The Europium ion incorporated into the liquid silica-titania solution acts as red light emission center in the luminescent materials. This luminescent nano composite pigment has great potential of application in preparing luminescent ink. Inkjet printer loaded with the prepared ink to show its potential usage as tagging material performed the printing test on a white paper.