These nanoparticles could be complexed with human serum albumin to originate water-dispersible nanoparticles, which could act as promising upconverting fluorescence labels when they are conjugated with cyclic arginine-glycine-aspartic acid (cRGD) sequence, specifically targeting both human glioblastoma cell lines and melanoma cells overexpressing αvβ3 integrin receptors. Here, ALB is linked to glioblastoma.