Upconverting-Nanoparticle-Assisted Deep Photocuring: Excitation Transport, Local Emission, Heating and Network Uniformity

Upconverting nanoparticles can transport excitation into optically thick regions by absorbing near-infrared light and emitting at shorter wavelengths that activate a photoinitiator. Deep illumination does not automatically mean uniform cure: particle dispersion, local emission efficiency, reabsorption, initiator proximity and photothermal heating can all create spatially varying conversion. This review defines the measurements needed to distinguish optical penetration from genuine network uniformity and uses recent nanoparticle- assisted printing studies to frame qualification.

ER-304 · Version 0.5.