Strain and grain size determination of ceo2 and tio2 nanoparticles: Comparing integral breadth methods versus rietveld, µ-raman, and tem Canchanya-Huaman Y. es_PE Mayta-Armas A.F. es_PE Pomalaya-Velasco J. es_PE Bendezú-Roca Y. es_PE Guerra Torres, Jorge Andrés es_PE Ramos-Guivar J.A. es_PE 2024-05-30T23:13:38Z 2024-05-30T23:13:38Z 2021
dc.description Funding: The authors thank the Fondo Nacional de Desarrollo Científico, Tecnológico y de Inno-vación Tecnológica (PROCIENCIA-CONCYTEC), project number: 177-2020-FONDECYT (PROCIEN-CIA), project CLEAN NANOMAGNETIC. “The APC was funded by PROCIENCIA”.
dc.description.abstract Various crystallite size estimation methods were used to analyze X-ray diffractograms of spherical cerium dioxide and titanium dioxide anatase nanoparticles aiming to evaluate their reliability and limitations. The microstructural parameters were estimated from several integral breadth methods such as Scherrer, Monshi, Williamson–Hall, and their variants: (i) uniform deformation model, (ii) uniform strain deformation model, and (iii) uniform deformation energy density model. We also employed the size–strain plot and Halder–Wagner method. For this purpose, an instrumental resolution function of an Al2O3 standard was used to subtract the instrumental broadening to estimate the crystallite sizes and strain, and the linear regression analysis was used to compare all the models based on the coefficient of determination. The Rietveld whole powder pattern decomposition method was introduced for comparison purposes, being the best candidate to fit the X-ray diffraction data of metal-oxide nanoparticles. Refined microstructural parameters were obtained using the anisotropic spherical harmonic size approach and correlated with the above estimation methods and transmission electron microscopy images. In addition, µ-Raman spectra were recorded for each material, estimating the mean crystallite size for comparison by means of a phonon confinement model. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
dc.description.sponsorship Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica - Concytec
dc.identifier.scopus 2-s2.0-85114349167
dc.language.iso eng
dc.publisher MDPI
dc.relation.ispartof Nanomaterials
dc.rights info:eu-repo/semantics/openAccess
dc.subject X-ray diffraction
dc.subject CeO2 es_PE
dc.subject Crystallite size es_PE
dc.subject Strain es_PE
dc.subject TEM es_PE
dc.subject TiO2 es_PE
dc.subject µ-Raman es_PE
dc.title Strain and grain size determination of ceo2 and tio2 nanoparticles: Comparing integral breadth methods versus rietveld, µ-raman, and tem
dc.type info:eu-repo/semantics/article
dspace.entity.type Publication