NAVIGATION
No surface group upconversion nanoparticles (violet blue light)
No surface group upconversion nanoparticles (yellow-green light)
Oil-soluble core-shell structure up-conversion nanoparticles (blue-violet light)
Oil-soluble core-shell structure up-conversion nanoparticles (yellow-green light)
PEG-COOH modified upconverting nanoparticles (near-infrared light)