NDLI: Experimental evidences of substitutional solution of Er dopant in Er-doped SnO$

Content Provider	Springer Nature Link
Author	Aragón, F. H. Coaquira, J. A. H. Hidalgo, P. Cohen, R. Nagamine, L. C. C. M. Silva, S. W. Morais, P. C. Brito, H. F.
Copyright Year	2012
Abstract	Structural and hyperfine properties of Er-doped SnO$_{2}$ nanoparticles synthesized by a polymer precursor method are reported in this study. X-ray diffraction patterns of samples doped with erbium up to 10 mol % indicate the formation of the tetragonal rutile phase. The mean crystallite size shows a rapid decrease from ~12 nm for the undoped sample down to ~4 nm for the 10 mol % Er-doped sample. Structural changes as a function of the Er content, i.e., changes in the lattice constants, Sn–O bond distances and bond angles, strongly suggest the substitutional solution of Er$^{3+}$ ions and the onset of oxygen vacancies throughout the SnO$_{2}$ lattice. No dipolar-magnetic interaction is determined from the Mössbauer spectra which are well resolved by fitting with a distribution of electric-quadrupole doublets. Changes observed in the quadrupole splitting as a function of the Er content have been associated to the local strain induced by the cationic size mismatch and oxygen vacancies. This local strain affects the lattice contribution of the electric field gradient. The linear increase of the isomer shift is assigned to the enhancement of the oxygen vacancies as the Er content is increased. It is found that the oxygen vacancies provide with conduction electrons to the Er-doped SnO$_{2}$ nanoparticulated system, therefore modifying its electronic properties.
Starting Page	1
Ending Page	10
Page Count	10
File Format	PDF
ISSN	13880764
Journal	Journal of Nanoparticle Research
Volume Number	15
Issue Number	1
e-ISSN	1572896X
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-12-11
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nanoparticles Rare-earth doped semiconducting tin oxide XRD diffraction TEM images Mössbauer spectroscopy Nanotechnology Inorganic Chemistry Characterization and Evaluation of Materials Physical Chemistry Optics, Optoelectronics, Plasmonics and Optical Devices
Content Type	Text
Resource Type	Article
Subject	Chemistry Nanoscience and Nanotechnology Atomic and Molecular Physics, and Optics Condensed Matter Physics Bioengineering Modeling and Simulation

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