NAVIGATION
Amino modified up-conversion nanoparticles-NH2 (yellow-green light)
Amino-modified up-conversion nanoparticle SiO2-NH2 (near-infrared light)
Amino-modified up-conversion nanoparticle SiO2-NH2 (yellow-green light)
Carboxyl modified up-conversion nanoparticles-COOH (purple blue)
Carboxyl modified up-conversion nanoparticles-COOH (yellow-green light)