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