NANOPARTICLE SYNTHESIS
18 May 2022

Rare Earth Upconversion nanoparticles (UCNPs) utilise two-photon excitation which emits higher-energy photons by absorbing two or more low energy photons. Depending on the dopants of choice, UCNPs exhibit characteristic emission peaks at wavelengths ranging from ultraviolet (UV), visible light or near-infrared (NIR) illuminescence upon excitation at 975 nm.