| abstract |
Provided are cubic-phase (α-phase) erbium (Er)-doped near-infrared-II (NIR-II)-emitting nanoparticles. In certain embodiments, the nanoparticles are near-infrared-IIb (NIR-IIb)-emitting nanoparticles. Also provided are nanoparticles having disposed thereon a layer-by-layer crosslinked polymeric hydrophilic biocompatible coating. Also provided are compositions comprising the nanoparticles of the present disclosure. Methods of using the nanoparticles, e.g., for in vivo imaging, are also provided. |