E. Selvakumar; A. Chandramohan
Abstract
A new organic SHG active salt 3-Nitroanilinium L-tartrate m-nitroaniline (MLM) was synthesized and optically good single crystals were grown by solvent evaporation solution growth method at room temperature. The structure of the crystal identified by single crystal XRD analyses and it belongs to monoclinic ...
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A new organic SHG active salt 3-Nitroanilinium L-tartrate m-nitroaniline (MLM) was synthesized and optically good single crystals were grown by solvent evaporation solution growth method at room temperature. The structure of the crystal identified by single crystal XRD analyses and it belongs to monoclinic crystal system with polar space group P21. The functional groups present in product have been confirmed from the FT-IR spectral study. The optical transmission spectrum was recorded to examine the optical property of the title crystal. The thermo gravimetric and differential thermal analyses were carried out simultaneously to study the thermal behavior of the title crystal. The relative second harmonic generation activity of the title crystal was confirmed by the modified Kurtz-Perry powder test and it was found that the title crystal has 0.5 times second harmonic generation output than that of KDP.
Lila A. Alkhtaby
Abstract
We have to study the factors affecting the synthesis of Co doping ZnO Nano powder with the sol – gel method to study the effect of quantity or doping concentration we fix the reaction base at pH = 9 and change the doping concentration the structural and morphology ...
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We have to study the factors affecting the synthesis of Co doping ZnO Nano powder with the sol – gel method to study the effect of quantity or doping concentration we fix the reaction base at pH = 9 and change the doping concentration the structural and morphology carried out with X-ray and SEM show hexagonal wurtzite nanoparticles for Zn 1-x Co x O for x = 0.01 and x = 0.05 and increase of the cell volume and lattice parameter with increase of x concentration ,the florescence spectroscopy at room temperature show peaks at ultraviolet for both concentration with read shift for x = 0.05. To study the effect of pH value we fix doping concentration at x = 0.05, SEM shows a spherical nanoparticle with size 38 – 52 nm for pH = 9 and hexagonal nanoparticles with size 42 – 52 nm for pH = 6. The florescence spectroscopy at room temperature exhibit that for pH = 9 there is no band observed in the ultraviolet region bands are around 380,420 and 475 nm. The Ultraviolet/Visible (UV) Spectroscopy exhibit decrease of the band gap energy with increase doping concentration and decrease with increase pH value. Copyright © VBRI Press.
Jitendra Pal Singh; So Hee Kim; Weon Cheol Lim; Sung Ok Won; Keun Hwa Chae
Abstract
In the present work, we have reported the synthesis of calcium hydroxide from calcium nitrate. Synthesized nanoparticles were characterized using X-ray diffraction, scanning electron micrographs, and near edge X-ray absorption fine structure measurements. Synthesized nanoparticles exhibit tetragonal ...
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In the present work, we have reported the synthesis of calcium hydroxide from calcium nitrate. Synthesized nanoparticles were characterized using X-ray diffraction, scanning electron micrographs, and near edge X-ray absorption fine structure measurements. Synthesized nanoparticles exhibit tetragonal phase with space group P3m1. These nanoparticles exhibit almost spherical shape. Particle size of these nanoparticles are 55 nm and 69 nm for two different treatment of precursor. Microscopic studies shows that size distribution is affected by the change of thermal history. Local electronic structure measured at Ca (L- & K-) and O K-edges exhibit presence of spectral features that are characteristics of calcium hydroxide. Moreover, strength and magnitude of crystal field parameter is unaffected by thermal treatment utilized for synthesis of these materials. Copyright © 2018 VBRI Press.
Yashvant Rao; Gajendra Kumar Inwati; Man Singh
Abstract
Cadmium sulphide nanocrystals (CdS NCs) of ≈ 7.0 nm have been synthesized and structurally characterized with X-Ray Diffraction (XRD), High Resolution Transmission Electron Microscope (HR-TEM) and topographical 3D image by Atomic Force Microscopy (AFM). The binding and kinetic energies of 5th electron ...
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Cadmium sulphide nanocrystals (CdS NCs) of ≈ 7.0 nm have been synthesized and structurally characterized with X-Ray Diffraction (XRD), High Resolution Transmission Electron Microscope (HR-TEM) and topographical 3D image by Atomic Force Microscopy (AFM). The binding and kinetic energies of 5th electron of 3d orbital (inner 3d5/2) and 3rd (outer 3d3/2) of Cd were 405.93 and 412.67 eV as well as 1074 and 1080.76 eV respectively determined with XPS. The CdS at 298.15 K, when dispersed in water, methanol and ethanol with 100 µM each of rhodamine B (RB), sulphorhodamine B (SRB) and carboxyfluorescein (CF) the fluorescent dyes (FD) separately has enhanced UV-Vis absorbance by 45, 30 and 25% respectively in order of (RB-CdS) > (SRB-CdS) > (CF-CdS) within 200 to 320 nm as compared to without CdS. Probably the CdS has functionalized the functional groups of the dyes that could have induced the p-conjugated bonds to detain higher UV-Vis abs. especially one -COOH, four -CH2CH3, two -SO3, four -CH2CH3 and two –COOH, one >C= with one hydroxyl group respectively. Thus, the CdS-Dye-UV-Vis model could be proposed as new finding of our studies. Copyright © 2017 VBRI Press.
