N.N. Jandow

Al-Mustansiriya University · Department of Physics

ZnO films with various thicknesses (0.4, 0.6, 0.8, 1 and 1.3 μm) had been prepared on PPC plastic bases by using DC sputtering. XRD results showed that all the films displayed principally ZnO (002) peak at 2θ = 34.115°, 34.01, 34.16, 34.07 and 34.12° with FWHM of 0.41°, 0.34, 0.27, 0.21 and 0.368° respectively, which is coincide with wurtzite hexag...

In this work, ZnO nanostructure thin films were deposited with two different thicknesses (300 and 600 nm) on Poly Propylene Carbonate (PPC) substrates by using RF Magnetron sputtering technique in order to fabricate ZnO gas sensor for NO2 gas. The structural and morphological properties of the deposited films were studied by X-ray diffraction (XRD)...

In this research, nickel doped Iron oxide (Fe2O3:Ni) thin films were deposited onto glass substrates by using chemical spray pyrolysis (CSP) technique. The deposited films thickness was found to be about 350±30 nm. The films were annealed at two different temperatures (450 o C and 500 o C). The X-ray Diffraction spectra (XRD) results indicate that...

In this study, we have found a novel relationship among spiral arm pitch angles (p) and momentum parameter of the host spiral galaxies. In this study, we measured the momentum parameter for specimen of Spitzer/IRAC 3.6 μm images of 41 spiral galaxies evaluated employing a relation(Mbulge σ*/c)where Mbulge is mass of the bulge and σ* is the stellar...

Chemical spray pyrolysis method was used to prepare Co 3 O 4 films with various thicknesses. The films spread on heated glass at temperature 420 °C. UV-Visible spectrophotometer used to determine the transmittance spectra in the range of 450-900 nm. In addition to that, Dispersion parameters such as: ∞ , S o , o , M-1 , M-3 were calculated. The res...

Chemical spray pyrolysis method was used to prepare Co 3 O 4 films with various thicknesses. The films spread on heated glass at temperature 420 °C. UV-Visible spectrophotometer used to determine the transmittance spectra in the range of 450-900 nm. In addition to that, Dispersion parameters such as: ∞ , S o , o , M-1 , M-3 were calculated. The res...

In this study, we have found a new relation between spiral arm pitch angles (p) and the host bulge mass (bulge dynamical mass (M dyn)) in spiral galaxies, classical bulges, and pseudo-bulges. In this study, we measured the masses of supermassive black holes (SMBHs) for a sample of Spitzer/IRAC 3.6 µm images of 40 spiral galaxies estimated by using...

Al doped 1% and 3% zinc oxide deposited on glass substrate was prepared by chemical spray pyrolysis technique. Al was observed to decrease the absorbance and increase the absorption edge with photon energy. It is clearly seen that the Al content affect the optical constants such as: reflectance, extinction coefficient, refractive index, real part o...

Al doped 1% and 3% zinc oxide deposited on glass substrate was prepared by chemical spray pyrolysis technique. Al was observed to decrease the absorbance and increase the absorption edge with photon energy. It is clearly seen that the Al content affect the optical constants such as: reflectance, extinction coefficient, refractive index, real part o...

CdO thin films were synthesis utilizing chemical spray pyrolysis technique on to glass substrate from an aqueous solution of cadmium acetate dehydrate with various molarity ranging from 0.05 to 0.15. Transmittance spectra were recorded from UV-Visible spectrophotometer.The calculated values of Urbach energy were decreased from 909 to 800 meV, While...

In this work, we measured and compared the masses of supermassive black holes (SMBHs) for a sample of Spitzer/IRAS 3.6-µm images of 40 spiral galaxies estimated by applying two correlations (indirect methods) between SMBH and host- galaxy bulge velocity dispersion (σ) (MBH-σ relation) and pitch angle (P)(MBH-P) to those determined the SMBH mass usi...

In this work, the masses of supermassive black holes (SMBHs)have been measured and compared for a sample of Spitzer/IRAS 3.6-µm images of 40 spiral galaxies estimated by applying two correlations (indirect methods) between SMBH and host-galaxy bulge velocity dispersion (ζ) (M BH-ζ relation) and pitch angle (P)(M BH-P) to those determined the SMBH m...

CdO thin films were synthesized by utilizing chemical spray pyrolysis technique on to glass substrate from an aqueous solution of cadmium acetate dehydrate with various molarity ranging from 0.05 to 0.15. Transmittance spectra were recorded from UV-Visible spectrophotometer.The calculated values of Urbach energy were decreased from 909 to 800 meV w...

Lead (II) Sulfide PbS thin films were deposited on glass substrates at 25°C by chemical bath deposition (CBD) method. The structural properties of the films were studied as a function of the concentration of Thiourea (CS (NH2)2) as Source of Sulfide and deposition time. The surface morphology of the films was characterized by X-ray diffraction and...

Al doped 1% and 3% zinc oxide deposited on glass substrate was prepared by chemical spray pyrolysis technique. Al was observed to decrease the absorbance and increase the absorption edge with photon energy. It is clearly seen that the Al content affect the optical constants such as: reflectance, extinction coefficient, refractive index, real part o...

In this paper, we report the deposition of the pure ZnO and Co with 4% and 8% concentration doped ZnO thin films on glass substrates by using the chemical spray pyrolysis technique and subsequently the effect of Co on the structural and optical properties of the deposited ZnO thin films were characterized. X-ray diffraction (XRD) measurement shows...

This work presents the effect of Cu-doping on some optical properties of Cu:NiO thin film prepared by spray pyrolysis technique. UV-Visible spectrophotometer in the range 380-900 nm used to determine the absorbance spectra for various Cu-doping of Cu:NiO thin film. The transmittance and energy gap are decreased with increasing Cu-doping in the prep...

Advanced materials are artificial structure materials that exhibit properties not found in nature. Material that has a negative refractive index (left-handed materials) is found to get a lot of interest in the literatures. Controlling the geometry of classical material may lead to have a negative refractive index in a certain frequency range. In th...

Zns thin films are obtained by flash evaporation method onto preheated glass substrates. The transmittance analysis allowed the determination of refractive index and thickness using envelope method. It was found that the refractive dispersion data obeyed the single oscillator model. The calculated value of the refractive index (no) was found to be...

Zns thin films are obtained by flash evaporation method onto preheated glass substrates. The transmittance analysis allowed the determination of refractive index and thickness using envelope method. It was found that the refractive dispersion data obeyed the single oscillator model. The calculated value of the refractive index (n o) was found to be...

ZnO thin films were deposited on Poly Propylene Carbonate (PPC) plastic substrates using RF magnetron sputtering at a power of 200 W, 2×10 -2 mbar pressure and ambient substrate temperature. The microstructure of two different thicknesses (0.3 μm and 0.6 μm) of the films was investigated by using atomic force microscopy (AFM) and X-ray diffraction...

In this study, we report a comparative study of the structural, morphological, and optical properties of the deposited ZnO thin films on Poly Propylene Carbonate (PPC) and glass substrates by direct current (DC) sputtering technique. X-ray diffraction (XRD) spectra of the films on PPC and glass substrates show mainly the ZnO (002) diffraction peaks...

In this paper, we report the deposition of ZnO thin film on poly propylene carbonate (PPC) plastic substrate by sputtering technique. The structural, optical and electrical properties of the ZnO thin film were investigated. The ZnO thin film deposited on PPC plastic has a smooth surface morphology as revealed by scanning electron microscopy (SEM)....

In this study, we report the fabrication of ZnO metal-semiconductor-metal UV photodetector (MSM UV PD) by deposition ZnO thin film on poly propylene carbonate (PPC) plastic substrate using direct current (DC) sputtering technique, and Nickel (Ni) contact as electrodes. The structural, optical and electrical properties of the ZnO thin film were inve...

ZnO thin film was deposited on polypropylene carbonate (PPC) plastic substrate by direct current (DC) sputtering. The measurements of the absorption spectrum and the photoluminescence of the film were carried out. ZnO Metal‐Semiconductor‐Metal (MSM) photodetector with palladium (Pd) contact electrodes was then fabricated. The structural and elect...

In this paper, we report the fabrication and investigation of metal-semiconductor-metal UV photodetector (MSM UV PD) by deposition ZnO thin film on poly propylene carbonate (PPC) plastic substrate by direct current (DC) sputtering technique, using palladium (Pd) contact electrodes. The structural, optical and electrical properties of the ZnO thin f...

ZnO thin film was deposited on Poly propylene carbonate (PPC) plastic substrate by direct current (DC) sputtering. The measurements of the absorption spectrum and the photoluminescence of the film were carried out. ZnO Metal-Semiconductor–Metal (MSM) photodetector with platinum (Pt) contact electrodes was then fabricated. The structural and electri...