Multicolor lanthanide-doped CaS and SrS near-infrared stimulated luminescent nanoparticles with bright emission: application in broad-spectrum lighting, information coding, and bio-imaging

Abstract

A series of lanthanide-doped CaS and SrS nanoparticles possessing bright fluorescence under near-infrared light (NIR) illumination and tunable emission colors are prepared and applied in light emitting, information coding, cell-labeling and in vivo imaging. The high fluorescence intensity and easily tunable emission wavelength under 980 nm light excitation make these multicolor alkaline earth sulfide nanoparticles (AES NPs) good in vivo biolabels for simultaneous differentiation of multiple organs, and other NIR-excitation-based applications.