Structural, Optical, and Electronic Characterization of Fe-Doped Alumina Nanoparticles

The effects of iron doping on the structural, optical, and electronic properties of doped alumina have been studied. Single-phase iron-doped alumina Al 2− x Fe x O 3 ( x  = 0.00 to 0.30) nanoparticles were synthesized via citrate-precursor method. Formation of single-phase hexagonal corundum structu...

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Bibliographic Details
Published in:Journal of electronic materials 2018-01, Vol.47 (1), p.711-720
Main Authors: Heiba, Zein K., Mohamed, Mohamed Bakr, Wahba, Adel Maher, Imam, N. G.
Format: Article
Language:English
Subjects:
Aluminum oxide
Atomic structure
Band structure of solids
Characterization and Evaluation of Materials
Chemistry and Materials Science
Corundum
Density functional theory
Doping
Electron microscopy
Electronic properties
Electronics and Microelectronics
Energy gap
Infrared analysis
Instrumentation
Iron
Lattice parameters
Materials research
Materials Science
Mathematical analysis
Microstrain
Nanoparticles
Optical and Electronic Materials
Optical properties
Parameter estimation
Solid State Physics
Structural analysis
X-ray diffraction
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Summary:The effects of iron doping on the structural, optical, and electronic properties of doped alumina have been studied. Single-phase iron-doped alumina Al 2− x Fe x O 3 ( x  = 0.00 to 0.30) nanoparticles were synthesized via citrate-precursor method. Formation of single-phase hexagonal corundum structure with no other separate phases was demonstrated by x-ray diffraction (XRD) analysis and Fourier-transform infrared spectroscopy. The effects of iron doping on the α-Al 2 O 3 structural parameters, viz. atomic coordinates, lattice parameters, crystallite size, and microstrain, were estimated from XRD data by applying the Rietveld profile fitting method. Transmission electron microscopy further confirmed the nanosize nature of the prepared samples with size ranging from 12 nm to 83 nm. The electronic band structure was investigated using density functional theory calculations to explain the decrease in the energy gap of Al 2− x Fe x O 3 as the amount of Fe was increased. The colored emission peaks in the visible region (blue, red, violet) of the electromagnetic spectrum obtained for the Fe-doped α-Al 2 O 3 nanoparticles suggest their potential application as ceramic nanopigments.
ISSN:0361-5235
1543-186X
DOI:10.1007/s11664-017-5830-0