Optical Properties of Y_2O_3:Er,Yb nanoparticle prepared by Laser ablation in Liquid

摘要

In the past several years, there has been increasing interest in fluorescent nanoparticles due to various potential applications. These fluorescent nanoparticles are promising materials for biomedical field such as a marker for bioimaging. One of important optical properties is upconversion (UC) which emits visible light with infrared excitation. The advantages of the upconversion nanoparticles are high transparency, low damage and low autofluorescence of tissue. For biomedical application, the size of nanoparticle in the range from a few 10 to 200nm is needed. In this study, we prepared Y_2O_3:Er,Yb nanoparticles by laser ablation in liquid and controlled the size of nanoparticles. The effect of decreasing particle size on upconversion spectra was also investigated.