Srinivasan, R.R.SrinivasanKarthikeyan, N.N.KarthikeyanThiruramanathan, P.P.ThiruramanathanArun Thirumuruganbose, A. ChandraA. Chandrabose2026-10-082026-10-082026-09-14Srinivasan, R.; Karthikeyan, N.; Thiruramanathan, P.; Arun, T.; bose, A. Chandra (2026-09-14). Decoupling Strain and Crystallite Size Effects in Cerium Oxide Nanoparticles Using Williamson–Hall Analysis. International Journal of Nanoscience, , 2650023. https://doi.org/10.1142/s0219581x265002370219-581X1793-5350https://hdl.handle.net/20.500.12740/24944Cerium oxide (CeO 2 ) nanoparticles synthesized through a co-precipitation route were characterized by X-ray powder diffraction (XRD), where peak broadening analysis was employed to estimate crystallite size, microstrain, stress and deformation energy density. The Williamson–Hall (W–H) and Scherrer methods were employed to quantify crystallite size and lattice strain. To quantify strain and crystallite size effects, three Williamson–Hall models were employed: The isotropic strain model (W-H-ISM), anisotropic strain model (W-H-ASM) and energy density model (W-H-EDM). These models were applied to XRD-derived W–H plots, revealing distinct microstructural characteristics of the nanoparticles. The W-H-ISM provided an overall estimation of lattice strain, while the W-H-ASM accounted for crystallographic-direction-dependent strain variations. The W-H-EDM further correlated strain energy with defect density. This study advances the fundamental understanding of structure-property relationships in CeO 2 nanoparticles, providing critical insights for their tailored design in catalytic, energy storage and advanced nanomaterial applications.http://purl.org/coar/access_right/c_14cbstraindiffraction profilestressWilliamson-Hall analysisCeO2 nanoparticlesArticulohttps://doi.org/10.1142/s0219581x26500237