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Articles by Mohammed Hadi Shinen
Total Records ( 6 ) for Mohammed Hadi Shinen
  Mohammed Hadi Shinen , Amina K. Murad , S.A.A. AlSaati , Amjed Mirza Oda , Fouad Z. Razooqi and Abbas Hussein Mugheer
  A Quartz Crystal Microbalance (QCM) sensor coated with a thin film of PANI/MWCNT was used as a sensitive method for the determination of a number of following vapours: Acetic acid, Chloroform and Benzene. The detection was based on the absorption of the vapours of these organic compounds into the film by using gas cell chamber. The detection of these vapours can be obtained in part per million (ppm). The research includes the use of PANI/MWCNT films with different thickness (44, 62 and 92) nm where thickness of the PANI/MWCNT films was controlled by the spin coating process. Results show that increasing of sensitivity with increase of the concentration of injected analyte when the PANI/MWCNTfilm-coated QCM was exposed to the vapours of Acetic acid, Chloroform and Benzene. Best sensitivity to Chloroform and Benzene were obtained with film thicknesses 62 nm while in the case of Acetic acid best results were obtained with thickness of 92 nm.
  Khalid Haneen Abass , Mohammed Hadi Shinen and Ayad F. Alkaim
  The aim of this research is to prepare TiO2 films on Indium Tin Oxid (ITO)-glass substrates with various nano-layers via. sol-gel method and study the properties that make these films suitable for solar cell application. Polycrystalline TiO2 films are resulting from X-Ray Diffraction (XRD) examination with preferred orientation along (101) plane appear for the films with thickness more than 107 nm (3 layers) at 2θ = 25.62°. Other peaks appear (211), (004) and (200) at 2θ = 30.27, 35.49 and 48.69, respectively and the crystallite size ranged from 15-32 nm for the prepared films. The homogeneity of the films is appear from the scanning electron microscope in addition of smooth and free of pinholes. UV-Visible spectrophotometer use to recording the transmittance spectra in the range of 360-1000 nm. The energy gaps were determined by Touc Model and from the dispersion parameters which found good comparable to be 3.21 eV for the film thickness 155 nm (5 layers). The energy loss of electrons which travelling through surface and bulk of material also determined. Urbach energy is increase with the increasing of film thickness. Dispersion parameters (Eo, Ed) determined from Wemple and DiDomenco relationship.
  Ehsan A. Mohammad , Nahida B. Hasan and Mohammed Hadi Shinen
  Optical properties includes measurements of absorbance and transmittance spectra as a function of wavelength for films prepared from combination P3HT solution with multiwall carbon nanotubes then calculating the absorption coefficient and other optical constants. These films prepared with different concentrations ratio of multiwall carbon nanotubes added to P3HT (0.00025, 0.00050 and 0.00075 g). The values of absorbance, absorption coefficient and refractive index values for pure and doped polymer are increasing with increasing of the concentrations ratio of MWCNTs. The results showed decreasing values of transmittance with all concentrations ratio of MWCNTs, the values of reflectance are increases with increasing of concentration ratio, also results showed decrease of energy gap for allowed direct transition with increasing of doping ratio.
  Mohammed Sami Abdali , Ahmed Shaker Hussein and Mohammed Hadi Shinen
  In this research, study the effect of gamma radiation on the some of optical properties of (Fe2O3) thin 2 3 film prepared by chemical spray pyrolysis method in this study, structural properties including (X-ray diffraction, FTIR) tests were studied, the results were (X-ray) tests showed the membranes are multi crystallization and showed tests (FTIR) demonstrate the active groups of the prepared membrane. As for optical measurements, there was a change in optical properties after exposure of the membrane to irradiation as it has decreased energy gap as well absorbance spectrum, reflectance, refractive index, extinction coefficient, absorption coefficient, real and imaginary dielectric constant while the transmittance spectrum it has increased after exposure of the membrane to irradiation.
  Mohammed Hadi Shinen , Raheem Abed Jeber and Burak Kadem
  Thin nanoparticles of zinc oxide were prepared using sol-gel. "The samples were prepared nano thin film (71 nm), various weight ratios were added from the MWCNT to the colloidal solution and at a rate of" (0.423, 0.921, 1.624%). These solutions were deposited by using the spin coating technique on the glass substrate and interdigitated finger electrode. For the purpose of knowing the sensitivity and the extent of response of these samples to detect the different vapors of some toxic gases (ethanol, methanol, acetone and nitrogen). Nano thin film were prepared by using spin coting technique. The synthetic properties of these membranes were studied using X-ray diffraction.
  Raheem Abed Jeber , Mokhalad Ali Zbalh , Osamah Kareem Mohammed and Mohammed Hadi Shinen
  Poly (O-Toluidine) (POT) was used as a basic material in this research where nano-films of POT were deposited on n-type silicon wafers. The thickness of the (POT ) films was controlled by the spin coating process. Different thickness of (POT) (142, 97 and 81 nm) were obtained by using different spin speed (1000, 2000 and 3000 rpm), respectively. The current density-Voltage (J-V) characteristics were achieved in both light (100 mw cmG2) and dark conditions. The parameters of the photovoltaic samples that is open circuit Voltage (Voc), short-circuit current density (Jsc), Fill Factor (FF) and energy conversion efficiency (η) were calculated. We found that the best thickness of (POT ) film is 97 nm to get best energy conversion efficiency, short-circuit current density and maximum power point.
 
 
 
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