Researches published in scientific journals in 2016

No

Tilte

Researcher

Journal Title

Vol

No

Page No

Impact factor

Abstract

1

Synthesis, inhibition effects and quantum chemical studies of a novel coumarin derivative on the corrosion of mild steel in a hydrochloric acid solution

Ayad Z. Mohamed

Khalida F. Al‑Azawi1

Shaimaa B. Al‑Baghdadi

Chemistry Central Journal

10

23

 

2.55

The acid corrosion inhibition process of mild steel in 1 M HCl by 4-[(2-amino-1, 3, 4-thiadiazol-5-yl) methoxy]coumarin (ATC), has been investigated using weight loss technique and scanning electron microscopy SEM). ATC was synthesized, and its chemical structure was elucidated and confirmed using spectroscopic techniques

2

Improvement of the Fatigue Resistance and Increase Its Life of Specimens of Naval Brass Alloy Using Laser Shock Wave Processing

د.عبدالهادي كاظم

Journal of Nanoscience and Technology

1

2

69–72

1.556

 Laser shock processing (LSP) was performed on naval brass alloy specimen to reveal effectiveness on fatigue life. LSP experimental array was performed as follows: A convergent lens was used to deliver 0.5-1 J/pulse (1064 nm). In a 10 ns, laser FWHM pulse produced by Q-switched Nd:YAG laser of 6 Hz with spots of 0.5-2 mm in diameter moving forward along the work piece with pulse density of 500 pulses/cm2. Deionized water (3 mm thickness) was used as a transparent confining layer while the non-prate black paint (20 μm thickness) was used as an absorbing layer of laser beam. The optimum values of 1mm spot size, pulse energy of 1 J. LSP effective parameters, microstructure and fatigue life test were evaluated. Chemical composition analysis was conducted. The microstructure analysis included surface morphology by SEM, grain analysis by AFM. The results demonstrated that the LSP can be improving fatigue resistance for specimens which were used in this work by comparing with the untreated specimens. The fatigue life’s of the specimens after LSP was obviously increased by 64% at lower stress level due to the compressive residual stresses near the surface.

3

Enhancement of Solar Cell Performance Based On Porous Silicon

د.عبدالهادي كاظم

Journal of Nanoscience and Technology

2

2

73-75

1.556

 Recently, nanometer size semiconductors have been a topic of great interest. Chemical etching of silicon
produce P-Si layers have a strong link between the details of processing and the optical and electronic
properties of the resulting structure. This paper focuses on investigation the affecting of etching time on
the, etching rate, electrical properties of Psi layer and photovoltaic properties of PSi/Si solar cell. Good
photovoltaic (PV) properties (the fill factor (FF) 0.77,  η 28%) was obtain with 80 seconds etching
time.

4

Design and Evaluation of Immersed Wideband Non-polarizing Beam Splitter Using ZEMAX Program and Needle/ Tunneling Method

Ali H. Al-Hamdani

Hayfa  G. Rashid

Hussein T. Hashim

International Journal of Scientific & Engineering Research

4

7

 

3.8

 Herein a wideband non-polarizing cube beams splitters (NPBSs) for the telecommunication C-band. We engage analy-sis/simulation and design/optimization methods, using an optical design software ZEMAX-EE and Needle/Tunneling synthesis method to find optimal beam splitter parameters. Similar design parameters of minimum layers with ternary dielectric materials were introduced. The results show that ZEMAX software has the ability to design thin film non-polarizing beam splitters and in comparison to needle/tunneling method has reasonable result. Moreover, NPBSs are provided exhibiting ~ 50/50 beam ratio with reasonably tolerant deviations in angle of incidence.

5

Enhancing a Trombe wall charging and discharging processes by adding nano-Al2O3 to phase change materials

Miqdam T Chaichan

Ali H. Al-Hamdani

Adeeb M Kasem

international journal of science and Engineering research,

3

7

 

3.8

 In this study, two Trombe walls were designed and fabricated to evaluate the effect of enhancing the paraffin wax thermal conductivi-ty on the charging and discharging period of the wall. The nano Al2O3 was added to the paraffin wax of one wall. The study results revealed a faster charging and discharging times due to the improvement in the thermal conductivity of the wall with wax mixed with nano-material. The wall, which uses wax with nano, had higher temperatures and faster charging period than the wall with wax only. The exit air of this wall is hotter that of the other case. Given high thermal conductivity of the wax with nano-material (case 2), the loss of storage energy was faster, depending on the en-tering outside air temperature and its mass flow rate. The Trombe wall with nano-materials and wax had overall higher temperatures up to 29.08% compared to wax alone. At discharge period, the paraffin wax with nano-material temperatures was higher than that for the wax alone case up to 42.68%. The exit air temperatures from a Trombe wall with the nano-wax compound was higher by about 43.24% compared to the air exited from the other wall with wax only.

6

Theoretical Studies on Electrophilic Aromatic

Hasan R. Obayes

Khalida F. Al.Azawi

Ali H. Al-Hamadani

ORIENTAL JOURNAL OF CHEMISTRY

1

32

 

0.479

 Theoretical investigations of organic molecules for the objective of their structural stability are the most important techniques in this regards. Recently calculations and simulation reactions utilizing theoretical studies become attractive conventional method for the researchers. Density function theory (DFT) method was used to study the reaction of 8-hydroxyquinoline with 4-ethoxycarbonyl-benzene diazonium chloride as electrophilic aromatic substitution reaction. To study any reaction there are two explanations: first explanation depends on the reactant molecules and second explanation depends on the stability of the product molecules. Determine the stability of the molecule by comparing the energies (total energy, energy level of (HOMO), and energy gap), we have three stable molecules, are: HQ-7-YBAEE (II) for the total energy, HQ-6-YBAEE (II) for the energy level of (HOMO) and HQ-2-YBAEE (II) for the energy gap. The molecule HQ-4-YBAEE (II) is always at least stability in all data.

7

Design  and Evaluation of C-Band Non-Polarizing Beam Splitter Plate using ZEMAX

Ali H. Al-Hamadani

Hayfa  G. Rashid

Hussein T. Hashim

Wulfenia

2

23

 

0.267

 

 

With the aid ZEMAX-EE software, a strategy for designing C-band non-
polarizing neutral plate beam splitter is presented. The design construction was based
on a certain optical properties of homogeneous, isotropic three dielectric materials
TiO2, Al2O3 and SiO2 chosen as "High", " Medium" and "Low" index material,
respectively depositing on the BK-7 glass substrate. Result shows that the optimum
design consists of 17- layers and can be applied to a wide range of angles and
reflectance values.

8

Effect of angle of orientation of flat mirror concentrator on solar panel system output

Ali H. Al-Hamadani

Faten Sh. Zain Al-Abdin

Jiinnan H. Ali

IOSR Journal of Computer Engineering

1

18

 

1.213

 In this research two flat glass mirrors is used as concentrator of solar panel system. The mirrors increase's the concentration of sun light ray on the solar module. Anew model of solar panel system is designed by mean of software Zemax in order to find best possible inclination angle of the concentrator that improves the performance of the solar panel. So the efficiency is 59.5% for designed system with inclination angle 60° of the concentrator. Then a practical design for the solar panel system with concentrators is established. The outdoor measurements for the practical design indicated that the output power and efficiency is increasing by increasing the inclination angle of the concentrator and reaches its maximum value at 60o at different times of the date 5-2-2014. Also the results showed that the maximum value of efficiency is 0.85 at 11 o'clock at 60o. While the maximum value of the output power is 72.8w at 12 o'clock of the same day.

9

Enhancement of solar cell performance based on porous silicon

Ali H. Al-Hamadani

M. Qasim

K.S. Rida

Journal of Nanoscience and Technology

2

2

 

1.556

 Recently, nanometer size semiconductors have been a topic of great interest. Chemical etching of silicon
produce P-Si layers have a strong link between the details of processing and the optical and electronic
properties of the resulting structure. This paper focuses on investigation the affecting of etching time on
the, etching rate, electrical properties of Psi layer and photovoltaic properties of PSi/Si solar cell. Good
photovoltaic (PV) properties (the fill factor (FF) 0.77,  η 28%) was obtain with 80 seconds etching
time.

10

synthesis of aluminum and titanium oxides nanoparticles via sol-gel method: optimization for the minimum size

احمد عبد الامير حسين

كاظم عبد حبيتر

Journal of Nanoscience and Technology

2

1

37-39

1.556

Al2O3 and TiO2 nanoparticles were synthesized using sol-gel method. The structures of Al2O3 and TiO2 nanoparticles were investigated using X-ray diffraction (XRD) study. The morphology of nanoparticles was investigated by scanning electron microscopy (SEM) analysis. The FE-SEM images showed that most of the nanoparticles obtained for Al2O3 and TiO2 nanoparticles have spherical shape with a particle size of 14 nm and 43 nm for Al2O3 and TiO2 nanoparticles respectively. The absorption spectra of Al2O3 and TiO2 nanoparticles suspended in deionized water were recorded at room temperature using UV-visible spectroscopy. The absorption spectra show a strong peak at 344 nm and 483 nm for Al2O3 and TiO2 respectively. The results on absorption spectra are in good agreement with those investigated by XRD which confirmed the formation of Al2O3 and TiO2

11

ultraviolet photodetector based on TIO2 nanopracticles/porous siliconhetrojunction

عدي نايف محسن

زهراء جميل

كاظم عبد حبيتر

optik

 

127

2806-2810

0.742

TiO2nanoparticles (TiO2NPs) were deposited on porous silicon (PS) by drop casting technique afterprepared TiO2NPs by pulsed laser ablation in liquid (PLAL) and PS by photoelectrochemical etching(PECE). The structural and morphological measurements were investigated the formation anatase phaseTiO2NPs with size of 17–101 nm and mesoporous silicon at 14.18 nm average pore diameter. Reflectivityof PS was decreased after coated with TiO2NPs leading to much light trap. As a result, successful UVdetector synthesis with 0.045 A/W resposivity and 1.9 × 1012W−1cm Hz1/2specific detectivity.

 

13

Corrosion Inhibitor for St-37 Alloy by Laser Shock Peening Technique

اياد زوين محمد

عبد الهادي كاظم جدران

ورود مهند شاكر

Journal of Advanced electrochemistry

2

1

59-56

 

This study aims to reduce the corrosion that occurring in mild steel (st-37). Laser has been used as inhibitor to reduce corrosion rate by using Laser shock peening (LSP) technique for st-37 submerged in hydrochloric acid with concentration of 1 M and the immersion time of 30 minutes at room temperature. The corrosion rate was evaluated by two method; weight loss method and polarization method. The results were observed that the values of corrosion rate are decreased after using the laser shock peening from 7.7210 mm/y to 1.0716 mm/y

14

Design High Efficient Reflectivity of DBR

حيدر توران مهدي

علي حميد عبد الهادي

وائل ياس ناصر

المجلة العراقية لليزر

 

 

 

 

Bragg mirrors consisting of stacks of dielectric layers with an optical thickness of quarter wavelength, which are greater importance for optoelectronic device applications. The reflectivity can be increased by increasing the layers of the mirror until get the required value of it, for example for mirrors with 4 Bragg layers pairs, a relative refractive index contrast of 0.275 is necessary to obtain a reflectivity higher than 99%, whereas with 8 layer pairs for same refractive index contrast reflectivity of 99.99 % is obtained. The high reflectivity is purely caused by multiple-interferences effects. The best thickness calculated is InAs/InSb with 2.7749e-07 m pair alternating pair and 99% of reflectance. It can be analysis by using different matrix method such as transfer matrix method TMM) which is simplest method for study the characteristic of devices with different alternating layers.

 

15

Preparation of Nanophotonics LiNbO3 thin films and studying their morphological and structural properties by Sol-Gel method for waveguide applications

مكرم عبد المطلب فخري

مروة صباح محسن

ايفان طارق سليم

International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering

10

5

 

 

 

Lithium niobate (LiNbO3) nanostructures are prepared on quartz substrate by the sol-gel method. They have been deposited with different molarity concentration and annealed at 500°C. These samples are characterized and analyzed by X-ray diffraction (XRD), Scanning Electron Microscope (SEM) and Atomic Force Microscopy (AFM). The measured results showed an importance increasing in molarity concentrations that indicate the structure starts to become crystal, regular, homogeneous, well crystal distributed, which made it more suitable for optical waveguide application.

16

Synthesis of Aluminum and Titanium Oxides Nanoparticles via Sol-Gel Method: Optimization for the Minimum Size

احمد عبد الامير حسن

كاظم عبد حبيتر

Journal of Nanoscience and Technology

2

1

 

 

Al2O3 and TiO2 nanoparticles were synthesized using sol-gel method. The structures of Al2O3 and TiO2 nanoparticles were investigated using X-ray diffraction (XRD) study. The morphology of nanoparticles was investigated by scanning electron microscopy (SEM) analysis. The FE-SEM images showed that most of the nanoparticles obtained for Al2O3 and TiO2 nanoparticles have spherical shape with a particle size of 14 nm and 43 nm for Al2O3 and TiO2 nanoparticles respectively. The absorption spectra of Al2O3 and TiO2 nanoparticles suspended in deionized water were recorded at room temperature using UV-visible spectroscopy. The absorption spectra show a strong peak at 344 nm and 483 nm for Al2O3 and TiO2 respectively. The results on absorption spectra are in good agreement with those investigated by XRD which confirmed the formation of Al2O3 and TiO2.

17

Studying the effect of simultaneous variation in both of the bias current and feedback strength on the output dynamics of semiconductor laser with optoelectronic feedback

كاظم عبد حبيتر

قيس عبد الستار

حسن غسان عبد

IJIST

3

2

 

 

We report numerically the generation of spiking in semiconductor laser SL) with an optoelectronic feedback. The evolution of nonlinear dynamics of semiconductor lasers with optoelectronic feedback by changing together two of the control system parameters (i.e. the variation of the dc bias current of SL and the feedback strength simultaneously) is investigated. In addition to the period-doubling scenario to chaos which shows the transition of nonlinear dynamics from periodic to quasi-periodic, then to chaotic state and eventually to Mixed-Mode Oscillations (MMOs) is shown, this paper demonstrated that the optimal selection of system parameters can eliminate the generated chaos or exploiting the chaos benefits.

18

Preparation and Characterization Study of ZnS Thin Films with Different Substrate Temperatures

كاظم عبد حبيتر

Engineering and technology Journal

34

1

 

 

Zinc sulfide (ZnS) thin films were deposited on a glass and n-type Silicon wafer substrates at temperature range from 50 - 200 Co using pulsed laser deposition (PLD) technique. The structural, morphological, optical and electrical properties of the films have been investigated. The XRD analyses indicate that ZnS films have zinc blende structures with plane (111 )preferential orientation, whereas the diffraction patterns sharpen with the increase in substrate temperatures. The Atomic Force Microscopy (AFM) Images shows the particle size and surface roughness of the deposited ZnS thin film at substrate temperature 50 and 150  Co were about

 

              Legal Unit                Committees                 Quality Division

We have 37 guests and no members online

Top