Journal
PHYSICA B-CONDENSED MATTER
Volume 535, Issue -, Pages 114-118Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physb.2017.06.074
Keywords
ZnO; X-ray diffraction; SEM; PL and LSPR
Categories
Funding
- National Research Foundation of South Africa [93214]
- South African Research Chairs Initiative of the Department of Science and Technology
- University of the Free State
- South African Research Chairs Initiative of the National Research Foundation of South Africa [84415]
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Noble metal doped ZnO has been synthesized by the combustion method and the effect of different metals (Ag, Au, Pd) on the structural, morphological, optical, photoluminescence and localized surface plasmon resonance (LSPR) properties has been investigated. X-ray diffraction analysis revealed that the ZnO had a hexagonal wurtzite structure and the crystallite sizes were affected by the doping. The formation of noble metal nanoparticles (NPs) was investigated using transmission electron microscopy and diffuse reflectance spectra. The LSPR of the metallic NPs was predicted using Mie theory calculations. The absorption spectra were calculated using the Kubelka-Munk function and the optical bandgap varied from 3.06 to 3.18 eV for the different doping materials. The experimental results suggest that the origin of enhanced emission was due to direct interaction between the laser photons and the noble material NPs which in turn leads to photoemission transfer of electrons from the noble metals NPs to the conduction band of ZnO.
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