Optical characterization of chemical bath deposited bismuth sulphide (Bi2S4) thin films

No Abstract. Discovery and Innovation Vol. 17(3&4) 2005: 156-16

Optical Properties of Chemical Bath Deposited Bismuth Fluoride (Bif3) Thin Films

Thin films of bismuth fluoride (Bif3) were deposited using chemical bath deposition technique from chemical baths containing solutions of bismuth nitrate (EDTA) and potassium bromide with EDTA as complexing agent in slightly acidic medium. The films were characterized using Fourier transform infrared (FTIR) spectroscopy, and spectrophotometer. The spectral analysis reveals that some of the films were found to have high absorbance in UV regions while transmitting highly in the VIS Ð NIR regions. Some of the films absorb poorly throughout the UV Ð VIS Ð NIR regions and transmit highly in the same. These properties make them good materials for poultry protection and warming coatings, thermal control and anti-reflection coatings. Keywords: Bismuth fluoride (Bif3) thin films, optical properties , chemical bath, infrared rays, absorption reflection, warming coating, thermal control Discovery and Innovation Vol. 19 (1) 2007: pp. 33-3

Synthesis, structural and surface morphological characterizations of sulfated zirconia Nanoparticles via chemical route

Sulfated zirconia (SZ) nanoparticles (NPs) were successfully synthesized and deposited via chemical route called sol-gel technique. The structural, morphological, and optical properties the samples were investigated by X-ray diffraction (XRD), Energy Dispersive X-ray Spectrometry (EDX), Scanning Electron Microscopy (SEM) and UV-visible spectrophotometer. Results show that the transmittance of the samples increased from visible region (VIS) to infrared (UV) region. It also showed that the transmittance of the samples changed with the precursor's concentrations. Furthermore, the samples showed very low absorbance which decreased toward the infrared region. The nanoparticles have wide energy bandgap that varied from 3.80 to 4.00±0.05 eV and is therefore good candidate for solar cell and solar thermal applications. It also presents an attractive alternative material for biomedical implants due to its biocompatibility and mechanical strength.Keywords: Sulfated zirconia, sol-gel, nanoparticles, X-ray diffraction, wide-bandga