Williamson-Hall analysis in evaluation of lattice strain and the density of lattice dislocation for nanometer scaled ZnSe and ZnSe:Cu particles
| Autor: | Maryam Zamanian, Masoumeh Ghasemi Hajiabadi, Dariush Souri |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Diffraction Materials science Process Chemistry and Technology Analytical chemistry Nanoparticle chemistry.chemical_element 02 engineering and technology Zinc 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Ion Full width at half maximum chemistry Transmission electron microscopy 0103 physical sciences Materials Chemistry Ceramics and Composites Nanometre 0210 nano-technology Dissolution |
| Zdroj: | Ceramics International. 45:14084-14089 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2019.04.107 |
| Popis: | Undoped and Cu-doped ZnSe nanoparticle (NPs) were prepared and grown hydrothermally in aqueous media assisted by microwave irradiation (MWIR) at different synthesis conditions of pH and MWIR times. In the mentioned process, sodium hydroxide (NaBH4), used for preparing selenium ions source with dissolving it and selenium powder in deionized water. To investigate the structural aspects and nanoparticles morphology, X-ray diffraction (XRD) and transmission electron microscopy (TEM) were used. According to the results of XRD, no displacement was seen in the position of XRD peaks of ZnSe nanoparticles by altering the pH and microwave irradiation time. XRD analysis demonstrated cubic zinc blende NPs and TEM images indicated round shape morphology of them. Depending to the microwave irradiation time, upon the XRD outputs, the size of the synthesized NPs were in the range of 1.54–2.18 nm. In this research, for samples synthesized at different pHs (= 8, 10.2, 11.2 and 12.2), at two microwave irradiation time of 0 and 6 min, and also at the presence of Cu-dopant (with the contents of 0, 0.1,0.75 and 1.5%), structural characteristics such as dislocation density(δ), lattice strain(e), size of nanoparticles (D) and full width at half maximum (FWHM:βhkl) have been evaluated upon the Scherrer and Williamson-Hall methods, in which undoped and ZnSe:Cu 0.1% synthesized at pH = 11.2 have the best crystalline quality; such results for the optimum samples, introduce them as promising materials in optoelectronic devices. The results of structural features obtained from Scherrer and Williamson-Hall approaches are highly intercorrelated and show the same trends with the variation of synthesis conditions. |
| Databáze: | OpenAIRE |
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