(Left) Scanning transmission electron microscopy (STEM) image of core@multi-shell nanoparticles (Right) Schematic of core@multi-shell nanostructure and magnified STEM image. Credit: Korea Institute of ...

National University of Singapore researchers and their collaborators have unveiled a novel concept termed "supercritical coupling" that enables a several-fold increase in photon upconversion ...

Upconversion nanoparticles possess the distinctive power of converting low absorption photons to high emission energies, enabling minimal tissue absorptions and optimal tissue penetrations.

Photon upconversion involves a series of non-linear optical processes where the sequential absorption of two or more photons leads to the emission of a single photon with energy greater than the sum ...

Researchers developed core@multi-shell upconversion nanoparticles that emit full-color light, enhancing color accuracy in advanced display technologies. (Nanowerk News) Dr. Ho Seong Jang and ...

A project at the University of Science and Technology of China (USTC) has developed a contact lens allowing wearers to perceive near-IR wavelengths and see better in the dark. Described in Cell, the ...