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Iraqi Journal of Applied Physics Letters

الرسائل العراقية في الفيزياء التطبيقية

ISSN: 1999656X
Publisher: iraqi society for alternative and renewable energy sources and techniques
Faculty:
Language: English

This journal is Open Access

About

Iraqi Journal of Applied Physics (IJAPLett) is a scientific periodical sponsored and
published by the Iraqi Society for Alternative and Renewable Energy Sources and
Techniques (I.S.A.R.E.S.T.). The Editorial Board is responsible for the scientific content
and other editorial matters relating to the Journal. Manuscripts submitted are first screened
by the editors; those on subject matters within the scope of the IJAPLett are sent to an
expert referee for evaluation and may be sent to a second reviewer if necessary. This
screening process helps to assure an appropriate focus as well as high scientific quality of
the Journal. The IJAPLett welcomes submission of papers and letters in applied physics
and related fields of science, engineering and technology. They should have something in
common with what we now publish on inanimate materials and processes therein:
structures, transport, physical, electrical, dielectric, magnetic, and optical properties. Our
basic criterion stated below will continue to apply: papers must contain science, especially
physics, and there must be an application. We advise authors submitting papers to suggest
the names of at least two possible reviewers, with full information on addresses, phone and
e-mail. Suggestions of reviewers are welcome regardless of the subject.

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Contact info

P. O. Box 55259,
Baghdad 12001,
Iraq
Website: www.iraqiphysicsjournal.com
Email: admin@iraqiphysicsjournal.com
editor_ijap@yahoo.co.uk

Table of content: 2009 volume:2 issue:4

Article
An interesting experimental observation of O2 pressure effect on the surface roughness of ZnO thin films prepared by PLD technique

Authors: A.J. Haider
Pages: 3-4
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Abstract

In the foregoing section, we have seen that a high quality semiconductor nanostructure can be fabricated using PLD. A relatively smooth surface and a high crystalline quality, which are appropriate for good optoelectronic devices and applications, were obtained at oxygen pressure of 5x10-2mbar. But at vacuum of 5x10-1 mbar, a very low crystalline and a rough surface were obtained. This surface characterization is important for applications in gas sensors and catalysis.


Article
Bulk Solid Specimen Shape Dependences in the Molecular, Chemical- Shift Tensor Determinations

Authors: S. Aravmdan
Pages: 11-14
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Abstract

In this paper, it has been the effort to systematically document the salient results of the calculations which are taking the course from molecule to material. The ellipsoidal shapes are the ones which have the homogeneous magnetization for homogeneous susceptibility. The computer programs used in this analysis were written FORTRAN. Moreover, a simpler summation procedure could be evolved for the calculation of the shape dependent demagnetization factor.


Article
A Novel Multiband and Small Size Patch Microstrip Fractal Antenna for Wireless Applications

Authors: M.H. Hammed --- F.J. Jibrael
Pages: 15-18
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Abstract

A novel compact Plusses fractal patch microstrip antenna is investigated to be an efficient scheme of miniaturization based on the simulation results, the proposed antenna has shown to possess an excellent size reduction possibility with good radiation performance for wireless applications. The new designed antenna has an operating frequency of 2.46 GHz, 6.58 GHz, and 9.2 GHz, with acceptable bandwidth and S11<-10 dB (VSWR<2). The radiation characteristics, VSWR, and S11 of the proposed antenna are described and simulated using microwave office MWO 2007 v7.5.


Article
New Glasses for Optical Fibres and Their Applications (invited contribution)

Authors: D.N. Payne
Pages: 19-20
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Abstract

Glasses with high-refractive index, high acousto-optic merit, low phonon energy and good solubility of the rare-earth are essential for optical waveguides devices of the future. At the ORC, research on advanced materials for multifunction waveguides is driven by device requirements. A more efficient optical fibre amplifier for 1.3um requires new glasses of lower vibrational energies to minimise nonradiative decay. Planar lossless splitters rely on a new waveguide material which allows high incorporation of erbium. Modulators need bulk or fibre optics which interact with acousto-optic power. Other new glasses with very high photosensitivity are being developed for fibre Bragg gratings, and highly non-linear glasses for all-optical switches. It is clear that for functions as diverse as amplification, splitting, modulation, switching or filtering the key to these devices is new glass materials.


Article
Structural and Optical Characteristics of CdSe Thin Films Prepared by Chemical Bath Deposition Technique

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Abstract

Cadmium selenide thin films were deposited on glass substrate using chemical bath technique for different bath temperatures 313K, 333K and 353K. Polycrystalline nature of the material was confirmed by X-ray diffraction technique and various structural parameters were calculated. The optical properties were revealed by UV-Visible transmittance spectra and the band gap energy was determined.


Article
A Boubaker Polynomials Expansion Scheme BPES-Related Analytical Solution to Williams-Brinkmann Stagnation Point Flow Equation at a Blunt Body

Authors: F.W. Li --- D.H. Zhang
Pages: 25-28
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Abstract

An analytic solution is proposed for the problem of Williams-Brinkmann axisymmetric steady flow in vicinity of a stagnation point at a blunt body. The boundary equations governing the Fow are embedded in the main equation system by the mean of the Boubaker Polynomials Expansion Scheme (BPES). The main differential equations are solved analytically and yield continue and differentiable C solutions which are compared to some published ones so far.


Article
Fundamental Understanding of the Propagation of Light Using Geometry

Authors: A.K. Alsamarrai
Pages: 29-32
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Abstract

The treatment of light as wave motion allows for a region of approximation in which the wavelength is considered to be negligible compared with the dimensions of the relevant components of the optical system. This region of approximation is called geometrical optics. When the wave character of the light may not be ignored, the field is known as physical optics. Since the wavelength of light is very small compared to ordinary objects, early unrefined observations of the behavior of a light beam passing through apertures or around obstacles in its path could be handled by geometrical optics.


Article
Spectroscopic Photoluminescence of Quantum Dots for Cancer Biomarker Panels

Authors: N. Korsencka --- S. Ostepanko --- M. Dypiec --- L. Zukov
Pages: 33-36
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Abstract

Ovarian cancer is the most lethal gynecologic malignancy. This largely reflects the fact that approximately 75% of cases are detected at advanced stages of disease, when cure is unlikely. It is accepted that detecting a greater number of patients with early stage disease by improving screening modalities could significantly improve overall survival. A novel approach to increase the sensitivity and specificity of early detection of cancer is through the application of nanotechnology, where luminescent semiconductor quantum dots (QDs) are conjugated with biomolecules. We report on the luminescence characterization of the bio-conjugated QDs with CA125 antigen using linkage molecules. Kinetic curves of the bio-conjugated 655nm QD luminescence show both photoenhancement and photo-degradation. Photo-enhancement is measured at various laser density power, temperatures and laser wavelengths. The mechanism of the PL enhancement is discussed.


Article
Analytical Equivalent Optical Properties of CdS-CuxS Thin Films Deposited on Glass Substrate by Spray Pyrolysis

Authors: H.I. Nacsu --- V. Paposcu
Pages: 37-40
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Abstract

Multi-layered, firmly adherent, optically clear CdS/CuxS films were deposited by spray pyrolysis on glass substrate. The glass/CdS/CuxS system was investigated. Firstly, CdS films were deposited using a solution containing CdCl2 and thiourea. For CuxS films deposition the solution used consisted on CuCl2 and thiourea. Multilayered films were also deposited. Mixed films of copper and cadmium sulfides were also deposited from solutions containing both copper and cadmium salts and thiourea on heated glass substrates, by spray pyrolysis. Visible transmission spectra were recorded for CdS/CuxS films. The film characteristics depend on the concentration and the molar ratio of cadmium and copper salts. These thin layers may be applied in solar control coatings, leading to important energy saving for air conditioning devices used for cars or other closed spaces.

Table of content: volume:2 issue:4