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Insights into post-annealing and silver doping effects on the internal microstructure of ZnO nanoparticles through X-ray diffraction probe
Institution:1. Young Researchers and Elite Club, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran;2. Faculty of Chemistry, Bu-Ali Sina University, Hamedan, Iran;1. Department of Physics, National Institute of Technology, Agartala, 799046, India;2. Department of Electronics and Communication Engineering, National Institute of Technology, Agartala, 799046, India;1. Department of Chemistry, Hanyang University, Seoul 133-791 Republic of Korea;2. Department of Chemistry Education, Chonnam National University, Gwangju 500-757, Republic of Korea;3. School of Energy Materials Chemical Engineering, Korea University of Technology and Education, Chungnam 330-708, Republic of Korea;4. Department of Defense Ammunitions, Daeduk College, Daejeon 305-715 Republic of Korea;1. Department of Physics, Quaid-e-Millath Government College for Women, Chennai 600002, India;2. Department of Physics, Presidency College, Chennai 600005, India;3. Centre for Nanoscience and Technology, Anna University, Chennai 600025, India;1. Department of Physics, School of Physical Sciences and Chemical Engineering, Lovely Professional University, Phagwara, Punjab 144411, India;2. Department of Electronics Technology, Guru Nanak Dev University, Amritsar, Punjab 143005, India;1. Çankırı Karatekin University, Faculty of Sciences, Department of Physics, 18100, Çankırı, Turkey;2. Çankırı Karatekin University, Faculty of Sciences, Department of Chemistry, 18100, Çankırı, Turkey
Abstract:ZnO nanoparticles were synthesized via Pechini method at various post-annealing temperatures (400°, 500°, and 600 °C) and silver doping concentrations (Zn:Ag molar ratios of 30, 20, and 10). Multifarious microstructural features including crystallite size, size-strain based broadening, residual stress, preferential orientation, crystallinity degree, lattice parameters, unit cell variation, and stacking fault probability were surveyed through phase analysis, Williamson-Hall plot, texture coefficient and unit cell calculations. X-ray probing verified good crystallinity with a hexagonal close pack Wurtzite morphology. Williamson-Hall analysis exhibited distributions of crystallite size and microstrain as well as their contributions on the line broadening of the host ZnO and guest Ag phases upon annealing-doping treatments. Textural analysis revealed the alteration in anisotropic crystallinity of the host phase and transformation of the preferred directions, (100) and (101), as function of annealing-doping processes. Besides, while guest Ag phase was shown to be polycrystalline with randomly orientated crystals at moderate concentration with respect to thermal treatment, preferential orientation went through a major change, (220) to (111), with increment in Ag loadings. Under identical synthetic conditions, the distinction in the lattice constants and unit cell variation between pure and doped ZnO nanoparticles was enforced and results verified major impressionability via annealing and doping factors.
Keywords:ZnO nanoparticles  Post-annealing  Silver doping  Lattice imperfection  Unit cell variation  X-ray diffraction probe
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