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Ikram Atta Al-Ajaj and Aseel A. Kareem

150, 200 and 250 °C for 1 h in an air circulating oven. Fig. 1 Schematic illustration of the PVD chamber. Fig. 2 Two-step synthesis of polyimide. In the case of PI, the purpose of thermal treatment was to run polycondensation reactions in solid state till completion of the PI formation. As a consequence of these reactions a release of water and imidization took place. The final thickness of the films was 5±0.1 μm. 3 Results and discussion 3.1 FT-IR analysis FT-IR measurements have been performed for the films obtained at

Open access

Mohammad Hassan Omidi, Mahboobeh Alibeygi, Farideh Piri and Mohammad Masoudifarid

nanocomposite were studied by VSM, XRD and FT-IR. 2 Experimental 2.1 Apparatus Electrochemical experiments were performed with a 797 VA Computrace (Metrohm) for cyclic voltammetry studies (CVS). A conventional three-electrode system was used, including a platinum wire as an auxiliary electrode, Ag/AgCl (saturated KCl) as a reference electrode, and the prepared electrode made from the nanocomposite as the working electrode. A 1 M LiCl solution was used as an electrolyte. For characterization of the nanocomposite FT-IR (Fourier transform infrared) spectra were

Open access

M.I. Zakirov and O.A. Korotchenkov

) was used as the photogeneration source [ 25 ]. Surface photovoltage (SPV) decays were measured in the contactless capacitor arrangement, and details of the setup are given in the literature [ 26 ]. Fourier transform infrared (FT-IR) spectra were recorded using FT-IR Spectrometer SPECTRUM BX II (Perkin Elmer). 3 Results and discussion 3.1 PL spectra Photoluminescence spectra of SC1, SC2 and SC3 samples are shown in Fig. 1 . They can be decomposed into two components (dashed lines) with relative intensities given by the vertical bars. It is seen that a

Open access

Kais Elghniji, Zohra Anna-Rabah and Elimame Elaloui

method via the chemical modification of titanium isopropoxide with esterification mixture. This is an efficient method for introducing water homogeneously (in situ) into a solution and therefore avoiding the problems associated with mixing irregularities. This method takes only substantial time (3 days) to obtain a transparent monolithic gel. The precipitate formation never occurs. FT-IR spectra of the samples suggest that the acetic acid is chemically bound to the titanium by bridging acetates leading to Ti[(OH) y (OOCCH 3 ) x ] oligomers. 2 Experimental

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A.V. Ramya, Anu N. Mohan and B. Manoj

dispersed in isopropyl alcohol (IPA) and was ultrasonicated in water (SKS) resulting in the exfoliation of graphite flakes into graphene sheets or few layer graphene. 2.2 Chemical and structural characterization The samples obtained before and after Hummers’ treatment and sonication were analyzed using various structural and morphological characterization techniques such as X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), scanning electron

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Anukorn Phuruangrat, Budsabong Kuntalue, Surachai Artkla, Surin Promnopas, Wonchai Promnopas, Somchai Thongtem and Titipun Thongtem

times, and dried at 80 °C for 24 h. The products were characterized by X-ray diffraction (XRD, Siemens D500) in the range of 2θ scanning angle of 15° to 60°, using CuKα radiation with graphite monochrome and a Ni filter, Fourier transform infrared spectroscopy (FT-IR, Bruker Tensor 27, better than 1 cm −1 ) operating in the range of 4000 cm −1 to 400 cm −1 with KBr as a diluting agent, Raman spectroscopy (T64000 HORIBA Jobin Yvon with high spectral resolution) using a 50 mW and 514.5 nm wavelength Ar green laser, scanning electron microscopy (SEM, JEOL JSM-6335F

Open access

Changchun Chen, Pengfei Hu, Jun Yang and Zixuan Liu

placed into the air blowing thermostatic oven under 60 °C for 48 hours. When they were naturally cooled down to room temperature, these x-SBT/PVDF thin films were successfully fabricated. 2.3 Structural and electrical characterizations The crystal structure properties of x-SBT/PVDF films on Si substrate synthesized in this study were investigated by θ to 2θ method of XRD with a CuKα 1 (λ = 0.15406 nm) source at 40 kV and 35 mA using an ARL XTRA powder X-ray diffraction diffractometer at a scan rate of 10°/min. FT-IR spectra were performed on a Nicolet FT-IR

Open access

Juliet Ordoukhanian, Hassan Karami and Azizollah Nezhadali

, therefore decreases the size of nanoparticles [ 14 ]. In the present work, two widely used nanoparticles of iron and iron oxide were obtained at the same time by the pulsed current electrochemical method using a membrane divided electrochemical cell and iron (II) sulfate aqueous solution as a starting material. The composition, size and morphology of the synthesized samples were characterized by FT-IR spectroscopy, XRD, SEM, TEM and VSM studies. The method has been found to be simpler, efficient, clean and energy saving, which could have a potential for industrial

Open access

Suresh Kumar and J.K. Sharma

image processing approach using ImageJ programme has been also used to measure the particle size from 2D SEM images. Fourier transform infrared spectroscopy (FT-IR) measurement has been performed by Perkin Elmer 1600 FT-IR in the spectral range of 400 cm –1 to 4000 cm –1 in % T mode using KBr pellet technique. The X-ray powder diffraction (XRD) data was recorded using PANaytical’s X’Pert-Pro diffractometer, with CuKα radiation (λ = 1.5406 Å), operating at 40 kV and 40 mA. The 2θ scanning range was from 10° to 60° in steps of 0.02°. The XRD data was further analyzed

Open access

I. Md. Zahid, S. Kalaiyarasi, M. Krishna Kumar, T. Ganesh, V. Jaisankar and R. Mohan Kumar

to each other. The DSDMS crystal was grinded to uniform fine powder and subjected to powder X-ray diffraction study to reveal crystalline perfection of the compound. The peaks were indexed using PowderX program ( Fig. 4 ) which shows the predominant planes of DSDMS crystal. Fig. 4 Powder XRD pattern of DSDMS. 3.2 IR and Raman spectral studies 4-N,N-dimethylamino-4′-N′-methylstilbazolium 2,4-dimethylbenzenesulfonate (DSDMS) crystal was powdered and FT-IR and FT-Raman spectra were recorded to identify the presence of functional groups. Fig. 5