Acharya Nagarjuna University

Solid-state reaction (SSR) method was used to prepare undoped and Dy3+-doped magnesium cadmium pyrophosphate (MCP) nanopowders (NPs). The average crystallite size was determined using Scherrer’s technique and W–H plot method in the powder X-ray diffraction study. Further, Rietveld refinement was carried out using the GSAS-II software package with Cu Kα radiation (λ = 1.5418 Å). The surface morphology of the prepared samples shows a clustered pattern that resembles a stone-like structure in FE-SEM analysis. Raman spectral analyses confirmed the presence of the pyrophosphate groups, and FT-IR study was used to assess the vibrational modes of the samples. According to DRS study, optical bandgap values of the prepared samples are in the range 2.99–3.49 eV. The PL spectra of the samples exhibit emission at 574 nm when excited at 347 nm. The maximum emission intensity was observed at 574 nm for the 0.01

In order to investigate the transitory dispersal of a pollutant released from an outside source into a Jeffrey tetra-HNF over a stretching sheet considering heat and mass transpiration traits, we dispersed Ag, TiO2, ZnO, and Cu nanoparticles in ethylene glycol, which was the base fluid. This analysis considers the impacts of heat sources or sinks, magnetic fields, and thermal radiation. The bvp4c method is administrated to solve the resultant equations. Tables and figures provide an apparent representation of the outcomes. Understanding the thermal properties of tetra hybrid nanofluids can aid energy systems, biomedical fluid dynamics, and engineering applications, where the fluid flow and heat transpiration are essential to system performance. Notably, the heat transfer rate is 14.67% higher in tetra-HNF compared to NF, HNF, and Tri-HNFs. The model might be a helpful tool for assessing the impact of decontaminating actions for the water body and comprehending the polluting circumstances of an incorrect discharge incidence.

In this paper, liquid crystal texture analysis is adopted to estimate dipole related behaviour in ferroelectric liquid crystals: ((S)-(-)-2-methylbutyl 4'-(4"-n-alkanoyloxybenzoyloxy) biphenyl-4-carboxylates, where n = 16 and 18). In general, the true molecular dipole moments of liquid crystals arise from the charge distribution between the atoms of the molecules. Since molecular realignment under external or thermal conditions leads to changes in both polarisation and optical texture, the brightness variations observed in POM images reflect orientation dependent dipole behaviour. Therefore, grey level texture patterns can be used to track qualitative trends associated with dipole related molecular alignment. In the present work, the distribution of grey level intensities in liquid crystal textures is used only to correlate with charge distribution-based dipole behaviour and not as a physical measurement of the molecular dipole moment. Furthermore, dipole moments are computed from the molecular polarisabilities of the samples using FTIR spectroscopy. The results obtained from both approaches are presented only in terms of their qualitative trends and not in terms of magnitude or direct physical equivalence. While texture analysis relies on grey-level intensities, FTIR determines dipole moments from vibrational frequencies that reflect true molecular polarisability.

This paper applies a wrapped exponential distribution to the axial domain for arcs of arbitrary lengths. Furthermore, we provide a closed-form expression for the characteristic function of the l-axial wrapped exponential distribution. We conduct a comprehensive analysis of population characteristics, parameter estimation techniques, and simulation studies, focusing primarily on the semicircular exponential distribution. Additionally, we discuss the practical applicability of this distribution to real-world datasets.

Eu3+ doped Lithium Cadmium Orthophosphate (LCP = Li2Cd2(PO4)2) nanopowders were prepared by using the Solid State Reaction (SSR) method. Different structural and spectroscopic techniques were used to characterize the prepared samples. An orthorhombic phase (Pnma space group) with an average crystallite size of 30-39 nm was determined by P-XRD. Clustered irregular stone-like shapes were revealed by FE-SEM, and elemental composition was confirmed by EDS analysis. FT-IR and Raman analysis were used to identify the (PO4)3-vibrational modes. Optical bandgap values in the range 5.43-5.70 eV were analyzed by DRS study. When excited at 250 nm and 394 nm, PL spectra reveal an emission at 611 nm (5D0-* 7 7F 7F2 7F2) and 693 nm (5D0-* 7 7F 7F4 7F4). By using the PL data PLQY (43% and 4%), concentration quenching and lifetime decay were determined. Photometric analysis was used to calculate color characteristics, such as CCT, CRI, and CP. The prepared samples exhibit reddish-orange emissions in their PL spectra. These results i indicate the material's suitability for solid-state lighting devices.