Our manuscript “Spectral Selectivity of Plasmonic Interactions between Individual Up-Converting Nanocrystals and Spherical Gold Nanoparticles”, describing experimental and theoretical analysis of the effect of plasmonic nanoparticles on two independent relaxation channels of nanocrystals, has been published in MPDI Materials. The experiments were conducted in Optics of Hybrid Nanostructures labs at Nicolaus Copernicus University in Torun, Poland.