Size Dependence of Lattice Parameter and Electronic Structure in CeO Nanoparticles.

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ID: 103095
2020
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Abstract
Intrinsic properties of a compound (e.g., electronic structure, crystallographic structure, optical and magnetic properties) define notably its chemical and physical behavior. In the case of nanomaterials, these fundamental properties depend on the occurrence of quantum mechanical size effects and on the considerable increase of the surface to bulk ratio. Here, we explore the size dependence of both crystal and electronic properties of CeO nanoparticles (NPs) with different sizes by state-of-the art spectroscopic techniques. X-ray diffraction, X-ray photoelectron spectroscopy, and high-energy resolution fluorescence-detection hard X-ray absorption near-edge structure (HERFD-XANES) spectroscopy demonstrate that the as-synthesized NPs crystallize in the fluorite structure and they are predominantly composed of Ce ions. The strong dependence of the lattice parameter with the NPs size was attributed to the presence of adsorbed species at the NPs surface thanks to Fourier transform infrared spectroscopy and thermogravimetric analysis measurements. In addition, the size dependence of the t states in the Ce L XANES spectra was experimentally observed by HERFD-XANES and confirmed by theoretical calculations.
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prieur2020sizeinorganic Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Prieur, Damien;Bonani, Walter;Popa, Karin;Walter, Olaf;Kriegsman, Kyle W;Engelhard, Mark H;Guo, Xiaofeng;Eloirdi, Rachel;Gouder, Thomas;Beck, Aaron;Vitova, Tonya;Scheinost, Andreas C;Kvashnina, Kristina;Martin, Philippe;
Journal Inorganic chemistry
Year 2020
DOI
10.1021/acs.inorgchem.0c00506
URL
Keywords
metal powder sintering microelectromechanical system (mems) powder filling three-dimensional (3d) solenoid coils through-silicon-vias (tsvs)

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