http://www.cd-bioparticles.com/p/DiagNano™-Antibody-Conjugated-Upconverting-Nanoparticles-660-nm_258_265_265_4618.htmlAntibody conjugated upconverting nanoparticles, absorbance max 975 nm, emission max 660 nm, White crystalline solid, Purity: >95.0%. NaYF4:Yb, Er, Mn