The present work is focussed on Zinc (2, 4, 6, 8 and 10 wt%) doped CdS thin films synthesized by sol-gel spin coating method and deposited on glass substrates. X-ray diffraction patterns of Zn doped CdS thin films exhibit cubic structure. The microstructural properties such as crystallite size, lattice constant, microstrain, dislocation density and stacking fault probability in the films were reported. The surface morphology and topography of the films was studied by using field emission scanning electron microscopy and atomic force microscopy. The incorporation of Zn in CdS and elemental composition of the films has been confirmed with X-ray photoelectron spectroscopy (XPS) and energy dispersive spectroscopy (EDS). Raman spectrum of Zn doped CdS thin films exhibits 1LO and 2LO phonon modes. The optical band gap of CdS thin films increased from 2.63 to 2.73 eV with the increase of Zn dopant from 2 to 10%. Thermoelectric power measurements show negative Seebeck coefficient indicating n-type semiconducting behaviour. The carrier concentration of Zn doped CdS thin films at room temperature are found to be in the range of 10 19-10 20 cm −3 suggesting that the prepared films are degenerate semiconductors. The increase in thermal conductivity of Zn doped CdS thin film is due to the increase in carrier concentration of the films. The lattice thermal conductivity of Zn doped CdS thin films had an inverse temperature dependent and at high temperatures shows the dominance of phonon scattering.
Cadmium sulfide (CdS) doped with different concentrations of Ni (2, 4, 6, 8, and 10 %) nanoparticles have been synthesized by chemical co-precipitation method. X-ray diffraction (XRD) studies confirm the crystalline nature of Ni doped CdS nanoparticles had a hexagonal wurtzite structure. Williamson-Hall (W–H), Size-Strain Plot (SSP), and Halder-Wagner (H–W) methods have been used to investigate the average particle size, lattice strain, stress, and energy density from the XRD peak broadening analysis. In W–H method, the models of uniform deformation, uniform deformation stress, and uniform deformation energy density have been implemented to determine the elastic parameters.
Nanophosphor compounds with both diagnostic and therapeutic functions are potential for cancer diagnosis and treatment. Lanthanide complexes play a crucial role in cancer diagnosis and therapy. Gadolinium-complexes are commonly used as magnetic resonance imaging (MRI) contrast agents for cancer imaging. The role of a lanthanide, Ytterbium (Yb) in cancer treatment is not unknown. The present work focuses on finding the role of Yb when doped into Gadolinium complexes in cancer treatment. Our results demonstrate that Yb doped Gadolinium molybdate coated with biocompatible silica, effectively inhibited the viability of breast cancer cells after 24 and 48 h of treatment in in vitro, and in contrast the nanophosphor compounds did not affect the viability of healthy cells. Yb doped Gadolinium molybdate also up-regulated apoptotic genes in breast cancer cells. Hence we propose that Yb doped Gadolinium molybdate is a promising theranostic compound. To the best of our knowledge, this is the first report showing anti-cancer nature of Ytterbium-doped into Gadolinium nanophosphors.
In the present work, reactive DC magnetron sputtering method is used to deposit TiO2 thin films on glass substrates. The structural, surface morphology and optical studies of TiO2 thin films were discussed by varying the oxygen flow rates from 1 to 4 sccm. X-ray diffraction patterns of TiO2 thin films show amorphous nature. The surface morphological and elemental composition of TiO2 thin films were examined by field emission scanning electron microscopy and energy dispersive X-ray spectroscopy. From the optical absorption spectra, the shifting of absorption edge towards the longer wavelength leads to the decrement of optical bandgap from 3.48 to 3.19 eV with an increase of oxygen flow rate from 1 to 4 sccm.
Calcium Bismuth Titanate (CaBi4Ti4O15) ceramics were prepared by conventional solid-state reaction method. X-ray diffraction patterns confirms the orthorhombic structure of CaBi4Ti4O15 and the lattice parameters were also determined. Bulk densities of the sintered ceramics were measured by the Archimedes method with xylene as the liquid media and found to be 97~98% of X-ray density. The surface morphology of CaBi4Ti4O15 is studied by Scanning Electron Microscope (SEM) attached with energy dispersive X-ray spectroscopy (EDS) inorder to determine the grain size as well as the chemical composition of CaBi4Ti4O15. The dielectric constant (k) and dielectric tangent loss (tan δ) of CaBi4Ti4O15 as a function of temperature were measured in the frequency range of 100 Hz-100 KHz. The dielectric constant, dielectric loss and ac conductivity of CaBi4Ti4O15 increases gradually with an increase in the temperature from 303 to 573 K. The ac conductivity of the prepared sample reveals that the conduction mechanism is electronic hoping
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.