The crystallization and physical properties of Al-doped ZnO nanoparticles

Un-doped Al (0–9 at.%) nanoparticles and doped ZnO powders were prepared by the sol–gel method. The nanoparticles were heated at 700–800 °C for 1 h in air and then analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectra and photoluminescence (PL). The results of un-dop...

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Bibliographic Details
Published in:Applied surface science 2008-07, Vol.254 (18), p.5791-5795
Main Authors: Chen, K.J., Fang, T.H., Hung, F.Y., Ji, L.W., Chang, S.J., Young, S.J., Hsiao, Y.J.
Format: Article
Language:English
Subjects:
Clusters, nanoparticles, and nanocrystalline materials
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Crystallization
Exact sciences and technology
Ii-vi semiconductors
Materials science
Materials synthesis
materials processing
Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Photoluminescence
Physics
Single-crystal and powder diffraction
Sol-gel processing, precipitation
Sol–gel
Structure of solids and liquids
crystallography
X-ray diffraction and scattering
ZnO
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Summary:Un-doped Al (0–9 at.%) nanoparticles and doped ZnO powders were prepared by the sol–gel method. The nanoparticles were heated at 700–800 °C for 1 h in air and then analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectra and photoluminescence (PL). The results of un-doped (ZnO) and Al-doped ZnO (AZO) nanoparticles were also compared to investigate the structural characteristics and physical properties. XRD patterns of AZO powders were similar to those of ZnO powders, indicating that micro-Al ions were substituted for Zn atoms and there were no variations in the structure of the ZnO nanoparticles. From the XRD and SEM data, the grain size of the AZO nanoparticles increased from 34.41 to 40.14 nm when the annealing temperature was increased. The Raman intensity of the AZO nanoparticles (Al = 5 at.%) increased when the annealing temperature was increased. Increasing the degree of crystalline not only reduced the residual stress, but also improved the physical properties of the nanoparticles.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2008.03.080