Search

Calibration curves having concentration range [(a1) and (b1)] 100-5000 ppm and [(a2) and (b2)] 100-1000 ppm with linear fitting for the ionic and atomic lines of Cr (283.5 and 357.8 nm, respectively) in the case of liquid deposited on filter paper configuration." On page 10, the sentence "the values are 16.7 ppm are 22.0 ppm" should be read as "the values are 19.8 ppm and 22.0 ppm.". [Extracted from the article]

Laser induced ablation studies have been carried out on formation of amorphous carbon and graphene on SiC thin films with their detailed characterization studies. Pulse laser ablation technique with process parameters such as 248 nm KrF excimer laser, frequency 10 Hz, 200 mJ of laser energy, and chamber pressure of 7 × 10−6 mbar has been used. Films were characterized in detail by grazing incidence X-ray diffraction, Fourier transform infrared, micro-Raman, X-ray reflectivity, Field emission scanning electron microscopic, transmission electron microscope, and Nano-indentation techniques and the results are reported. As deposited SiC film surface is rich in amorphous carbon and the same has been used as the nucleation site for further growth of graphene on SiC films. Film hardness increased from 29 GPa to 37 GPa for SiC film and graphene on SiC film (C-SiC), respectively. These films show bands due to surface phonon polariton mode in the range of 810–840 cm−1 that is a research concern today in nano-photonics area. Further these materials find applications in understanding the laser irradiation effects on SiC based nuclear fusion wall material. [ABSTRACT FROM AUTHOR]

Abstract: In this paper, effect of annealing and O2 pressure on the structural and optical properties of pulsed laser deposited thin films of TiO2 is reported. XRD, FTIR spectra and SEM images confirm that at high annealing temperatures, the rutile phase and crystalline quality of thin films increases. Higher pressure of O2 during deposition improves the rutile phase and favors the rod like growth of TiO2 thin film. The red shift in photoluminescence (PL) spectra of TiO2 thin films with annealing temperature is reported. Contact angle measurement data for the thin films reveals the hydrophobic nature of the films. The very low reflectivity (∼10%) reported in this paper may be promising for anti-reflection coating applications of pulsed laser deposited TiO2 thin films. [Copyright &y& Elsevier]

Studies on thermal plasma synthesis of calcium titanate slag by plasma smelting of ilmenite (Chnatrapur, India) is reported, The effect of flux on removal of iron and metal-slag separation was also studied. A slag rich in calcium titanate with metallic iron as a by-product was obtained in this process. These were characterized by bulk chemical analysis, optical microscopic studies, X-ray diffraction, electron probe microanalysis, and is reported here. Preliminary experimental results on use of this slag reveals that the same can be used for preparation of titanium carbide, an intermediate raw material for production of titanium tetrachloride. [ABSTRACT FROM AUTHOR]