文摘
On page 7899, S. J. Kwon, H. Ko, and co-workers report a promising plasmonic platform, prepared by a randomized array of silver nanoparticles, which greatly boosts near-IR-to-visible (green and red) luminescence from underlying upconversion nanoparticles (pale green particles) and substantially enhances near-IR photosensitivity. The silver particles in the disordered array effectively work as both plasmonic hot spots and nanoantennas, which notably increases quantum yield and emissivity of the luminescence.