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Title: Enhanced Air Stability in REPb3 (RE = Rare Earths) by Dimensional Reduction Mediated Valence Transition
Authors: Subbarao, Udumula
Sarkar, Sumanta
Jana, Rajkumar
Bera, Sourav S.
Peter, Sebastian C.
Keywords: Chemistry
X-Ray Absorption
Intermetallic Compounds
Metal Nanoparticles
Gold Nanoparticles
Shape Control
Issue Date: 2016
Publisher: American Chemical Society
Citation: Subbarao, U.; Sarkar, S.; Jana, R.; Bera, S. S.; Peter, S. C., Enhanced Air Stability in REPb3 (RE = Rare Earths) by Dimensional Reduction Mediated Valence Transition. Inorganic Chemistry 2016, 55 (11), 5603-5611
Inorganic Chemistry
Abstract: We conceptually selected the compounds REPb3 (RE = Eu, Yb), which are unstable in air, and converted them to the stable materials in ambient conditions by the chemical processes of "nanoparticle formation" and "dimensional reduction". The nanoparticles and the bulk counterparts were synthesized by the solvothermal and high-frequency induction furnace heating methods, respectively. The reduction of the particle size led to the valence transition of the rare earth atom, which was monitored through magnetic susceptibility and X-ray absorption near edge spectroscopy (XANES) measurements. The stability was checked by X-ray diffraction and thermogravimetric analysis over a period of seven months in oxygen and argon atmospheres and confirmed by XANES. The nanoparticles showed outstanding stability toward aerial oxidation over a period of seven months compared to the bulk counterpart, as the latter one is more prone to the oxidation within a few days.
Description: Restricted Access
ISSN: 0020-1669
Appears in Collections:Research Papers (Sebastian C. Peter)

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