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Investigation on optical, electrical and etching properties of 2-aminopyridinium 4-aminobenzoate: A phase matchable organic single crystal for optoelectronic device applications

-aminopyridine. Hence, the asymmetric system consists of a protonated 2-aminopyridine mono-ionized with 4-aminobenzoic acid. Previously, Arumanayagam et al. [9] performed optical transmittance, band gap, refractive index, optical conductivity, dielectric and powder SHG studies of these crystals. In this manuscript, additionally to those studies, we present the first investigation of the powder XRD, FT-IR, birefringence, photoconductivity, etching and phase matching properties of APAB. 2 Experimental 2.1 Material synthesis Pure specimens of 2-aminopyridine and 4

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Influence of preparation method on structural, optical and magnetic properties of nickel ferrite nanoparticles

fine nickel ferrite (NiFe 2 O 4 ) nanoparticles. 3 Characterization The structural investigation of the annealed powders of the samples was performed by using X-ray diffractometer (Rigaku DMAX-3A) with CuK α radiation (1.5406 Å). For examining microstructure of all the calcined samples, the scanned micrographs were taken by JEOL JSM-6510LV scanning electron microscope (SEM) machine. The Fourier transform infrared spectra were taken by Perkin-Elmer 100 Series FT-IR spectrometer with potassium bromide (KBr) as a solvent. The optical characterization was

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Influence of zinc concentration on band gap and sub-band gap absorption on ZnO nanocrystalline thin films sol-gel grown

. 3.3 FT-IR analysis Fig. 5 shows FT-IR spectra of ZnO thin films with different zinc concentrations. The characteristic ZnO absorption bands are centered at 488 cm −1 . However, a lower frequency peak of low intensity at ~759 cm −1 , related to the ZnO stretching mode, is observed in the present spectra. We observe various other peaks due to the solvent effects. The absorption bands are centered at 1423 cm −1 due to the O–H bending of the hydroxyl group. The absorption peaks at 1581 cm −1 are due to the acetate group (CH 3 COO − ). From Fig. 5 , it can be

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Synthesis and characterization of nanocrystalline barium strontium titanate powder by a modified sol-gel processing

range of Bragg’s angle of 10° to 85° using CuK α (1.5406 Å) radiation with a step size of 0.02 at room temperature. Microstructure was studied with a field emission scanning electron microscope (Mira 3-XMU). The chemical compositions of the samples were characterized by energy dispersive X-ray spectroscopy (EDS) (EDS microanalyzer in FESEM, Mira 3-XMU). Also, IR spectra of the xerogel and calcined powder were recorded with an FT-IR spectrometer (Bruker Vector 33) in the range of 400 to 4000 cm −1 . 3 Results and discussion 3.1. FT-IR analysis Fig. 2

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Synthesis of a novel environmental friendly plasticizer based on tung oil fatty acid for poly (vinyl chloride) blends

: 10.1002/vnl.10261. 30. Soudais, Y., Moga, L., Blazek, J. & Lemort, F. (2007). Coupled DTA-TGA-FT-IR investigation of pyrolytic decomposition of EVA, PVC and cellulose. J. Anal. Appl. Pyrolysis. 78(1):46–57. DOI: https://doi.org/10.1016/j.jaap.2006.04.005 . 31. Li, Y., Wang, C., Wang G. & Qu, Z. (2008). Application of the long-chain linear polyester in plastification of PVC. J. Wuhan Univ. Technol. 23(1), 100–104. DOI: 10.1007/S11595-006-1100-3. 32.Yin, B. & Hakkarainen, M. (2010). Oligomeric isosorbide esters as alternative renewable resource

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Characterization of magnetic biochar amended with silicon dioxide prepared at high temperature calcination

and increase the granules size, which further can be used in pollution control measures. In addition, the effect of calcination on textural, mineralogical, and magnetic properties of magnetic biochar amended with SiO 2 has seldom been studied in literature. In this study, magnetic kans grass biochar was amended with SiO 2 and calcined at 1000 °C under nitrogen environment to investigate the composite material textural, mineralogical, and magnetic variations using different characterization techniques (i.e. XRD, FT-IR, SEM, EDX, TGA, BET and saturation

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Sonochemical-assisted magnesium borate synthesis from different boron sources

.V., Rajendran, V., Jeyasubramanian, K., Suresh Kumar, N. & Abdel-Hameed, S.A.M. (2006). Ultrasonic investigation on nanocrystalline barium borate (BBO) glass ceramics. Synth. React. Inorg. Me. 36, 215-219. 35. Yilmaz, M.S., Kanturk Figen, A. & Piskin, S. (2012). Production of sodium metaborate tetrahydrate (NaB(OH)4·2H2O) using ultrasonic irradiation. Powder Technol. 215-216, 166-173. DOI: 10.1016/j.powtec.2011.09.043. 36. Yongzhong, J., Shiyang, G., Shuping, X. & Jun, L. (2000). FT-IR spectroscopy of supersaturated aqueous solutions of

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Synthesis and characterization of Ag@polycarbazole nanoparticles using different oxidants and their dispersion behavior

desirable to synthesize PCz based Ag nanocomposite to develop synergistic properties. Herein we used a strategy to adsorb Ag +1 and Fe +3 oxidants onto Ag NPs which were prepared by polyol reduction method to polymerize carbazole adhering to the surface of NPs[ 8 ]. The exploitation of Ag +1 and Fe +3 to polymerize carbazole around Ag NPs has been carried out to fabricate the composite materials. The morphology of the nanocomposite and polymer-metal phases was analyzed by TEM. The polymer was further characterized by FT-IR as PCz. Finally, surface plasmon resonance

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Synthesis and characterization of γ-glycine – a nonlinear optical single crystal for optoelectronic and photonic applications

numerous reports on this compound, the extraordinary characteristics of gamma glycine force the researches to perform deeper studies on its properties. The main aim of this work is to explore and shed light into anisotropic nature as well as the phase matching properties. Herein, we report the anisotropic behavior of gamma glycine in mechanical and laser damage threshold properties and the dependence of particle size with respect to second harmonic generation. Apart from these studies, single and powder X-ray diffraction analyses, UV-Vis spectroscopy, FT-IR analysis

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Spectroscopic studies of alumina supported nickel catalysts precursors: Part II - catalysts prepared from alkaline solutions

Spectroscopic studies of alumina supported nickel catalysts precursors: Part II - catalysts prepared from alkaline solutions

Nickel alumina supported catalysts were prepared from alkaline solutions of hexaamminenickel nitrate by CIM and DIM methods (classical and double impregnation, respectively). The catalysts exhibited different nickel species due to the existence of various metal-support interaction strengths. As a consequence, the reducibility and other surface properties changed as a function of the preparation method. The aim of this work was to study the interaction between the metal precursor and alumina surface by means of FT-IR (Fourier transform infrared) and FT-IR/PAS (FT-IR photoacoustic spectroscopy).

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