Synthesis of Mixed-Valent Lanthanide Sulfide Nanoparticles.

ABSTRACT: In targeting reduced valent lanthanide chalcogenides, we report the first nanoparticle synthesis of the mixed-valent ferromagnets Eu₃ S₄ and EuSm₂ S₄ . Using divalent lanthanide halides with bis(trimethylsilyl)sulfide and oleylamine, we prepared nanoparticles of EuS, Eu₃ S₄ , EuSm₂ S₄ , SmS_1.9 , and Sm₃ S₄ . All nanoparticle phases were identified using powder X-ray diffraction, transmission electron microscopy was used to confirm morphology and nanoparticle size, and magnetic susceptibility measurements for determining the ordering temperatures and valence. The UV/Vis, Raman and X-ray photoelectron spectroscopies for each phase were compared. Surprisingly, the phase is

SUBMITTER: Glaser P 

PROVIDER: S-EPMC10387447 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature