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تصميم وتصنيع مجزئ حزمة للمنطقة تحت الحمراء القريبة == Design and Construction of Beam Splitter in The Near Infra Red Region

Author name: سمير محمد سعيد العاني
Supervisor name: سامي عبد الحسين هاتف | مؤيد عزيز حسن
General topic: Laser Science
Specific topic: Laser Science
Degree: Master
University: University of Technology - Al-Rasheed College of Engineering and Science - Department Of Applied Sciences
Language: Arabic
University location: Baghdad
First pages:

تصميم العدسة الثنائية اللونية الملتصقة باقل الزيوغ اللوني ,الكروي والمذنب == Design of Chromatic Cemented Doublet Lens with Minimum Chromatic, Spherical and Coma Aberrations

Author name: ميديا اسماعيل سليمان الكاكـي
Supervisor name: ضياء نوري رؤوف
General topic: Laser Science
Specific topic: Laser Applications in Physics
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:

تصنيع مواد متوافقة احيائيا للعظام التعويضية باستخدام الليزر ووسائل تقليدية == Fabrication of Biocompatible Material for Bone Implants Using Laser and Conventional Means

Author name: هدیل فیاض عباس
Supervisor name: رائد عبد الوھاب اسماعیل | ولید خلف حمودي
General topic: Laser Science
Specific topic: Laser Applications in Physics
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:
Abstract: The present work describes coating the titanium implants with biocompatible materials (ceramics or composites). Three techniques were implemented to materialize this work; these are : pulsed laser deposition, spray pyrolysis, and electrochemical deposition. In these techniques, the influence of deposition temperature, solution concentration, polymer and H2O2 addition, buffer layer sandwiching, and electrolytes combinations were tested. The obtained films’ properties were investigated by using Fourier Transform Infrared Spectroscopy (FTIR), Atomic Force Microscope (AFM), Optical Microscope, X - ray Diffraction (XRD), Scanning Electron Microscope (SEM), Vickers’ hardness instrument, and Simulated Body Fluid (SBF).Composite films prepared by pulsed laser deposition showed the formation of polycrystalline hydroxyapatite of low crystallinity due to the addition of polymeric shrimp crusts. These films had (80 - 90 nm) spherical grains and constitute only (20 - 25%) of the favorable range (80 - 200 nm), and good hardness (≈550 HV). Pure hydroxyapatite (ceramic) films had (11 - 15 nm) surface roughness and an average grain size of (48 - 65 nm) which represents (7 - 31%) of the favorable range. All these films were porous, have good adhesion, and uniform surface morphology. Best results of pulsed laser deposition technique were obtained at 125oC deposition temperature. Films prepared by spray pyrolysis showed porous polycrystalline A and B - type carbonated hydroxyapatite and single crystalline α - Ca3(PO4)2; of relatively low crystallinity and hardness increased with deposition temperature. Post annealing at 400oC and 800oC for film prepared at 350°C of (0.0325 M) solution concentration has raised the hardness from 222 HV to 488 HV and 1204.25 HV respectively. The films of (0.0325 M) solution concentration had (101 - 105 nm) average grain size and were (78 - 100%) of the favorable range, whereas the films of (0.0406 M) solution concentration had (92 - 96 nm) and made (74 - 100%) of the favorable range. Good bioactivity and adhesion strength were obtained from these films which were enhanced significantly after post annealing. Optimum results were obtained from films prepared at 350oC of (0.0325 M) solution concentration after post annealing. Films prepared by electrochemical deposition technique showed uniform and highly porous polycrystalline B - type carbonated hydroxyapatite and polycrystalline α - Ca3(PO4)2. These films had an average grain size of (66 - 93 nm) when prepared from ((NH4)2HPO4 and Ca(NO3)2) whereas the grain size was (87 - 118 nm) when prepared from (Na3PO4 and Ca(NO3)2) with low roughness values. They had (45 - 68%) and (64 - 87%) respectively of the useful grain size in the favorable range (80 - 200 nm). The films covering area increased after H2O2 addition. These films had poor adhesion but this slightly improved together with the roughness after a buffer layer was deposited.The composite films had low crystallinity, grain size, hardness, and poor adhesion. Films prepared at 70oC from both electrolytes combinations ((NH4)2HPO4 with Ca(NO3)2, and Na3PO4 with Ca(NO3)2) had the best surface morphology and crystallinity with an optimum hardness (≈475HV). All these films had very fast dissolution rate in Simulated Body Fluid. Spray pyrolysis deposition technique proved to be the most promising technique for biocompatible materials fabrication for bone implants requirement

فعالية المضاد البكتيري لاكاسيد المعادن النانوية المحضرة بواسطة الاستئصال بالليزر في سائل == Antibacterial Activity of Metals Oxide Nanoparticles Induced by Laser Ablation in Liquid

Author name: فرح عبد الكريم عبد الامير
Supervisor name: خولة صلاح خشان | غسان محمد سلمان
General topic: Laser Science
Specific topic: Laser Applications in Physics
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:
Abstract: With the increasing of bacterial resistance against antibiotics, nanoparticles studies was appeared together with growing need for substituting theseantimicrobial agents. Recently, it has been demonstrated that metal oxides nanoparticles exhibits bactericidal effect against both bacteria strains.In this research, three kinds of metal oxide nanoparticles (Nickel oxide, Copper oxide and Titanium dioxide) colloidal solutions synthesized using laser ablation of nickel, copper and titanium pellet immersed in de - ionized water. Pulsed Nd : YAG laser with 1٠٦٤ nm wavelength and different laser energies (40, 80, 120, 160 and 200 mJ) was used to irradiate the targets for various ablation times : 5 (75 pulse), 10 (150 pulse), 15 (225 pulse) and 20 min (300 pulse).The UV - Visible absorption spectrum of NiO nanoparticles exhibited broad bands whose intensity decreased continuously above ~210 nm. The UV - Visible absorption spectrum of the CuO nanoparticles solution showed absorption peak around ~275 nm and another peak with low intensity around ~645 nm. While absorption spectrum of TiO2 nanoparticles exhibited strong absorption domination on the spectrum below ~360 nm. In all three metal oxide nanoparticles, absorption intensity increased with the laser energy and ablation time due to increase nanoparticles concentrations in liquid. Fourier Transform Infrared spectroscopy characterization confirmed the formation of metal oxide nanoparticles. All three metal oxides nanoparticles gave absorption bands below ~600 cm−1 arising from inter - atomic vibrations. X - ray Diffraction pattern of nanoparticles proved the presence of (111), (200) planes which belong to NiO and ( - 111), (112) planes that assigned to CuO and (101), (112), ( - 403) planes that related to TiO2. TransmissionElectron Microscopy measurement showed NiO, CuO and TiO2 nanoparticles with nearly spherical shapes and sizes at 2 - 21 nm, 3 - 40 nm and 6 - 30 nm respectively.The antibacterial activity of nanoparticles carried out against four types of bacteria : Escherichia coli, Pseudomonas aeruginosa, and Proteus vulgaris (gramnegative bacteria), Staphylococcus aureus (gram - positive bacteria) firstly by liquid medium method. 1000 μg ml - 1 concentration was the best - used concentration of nanoparticles for inhibiting growth of both bacteria strains. Among the three tested types of nanoparticles (NiO, CuO and TiO2) at highest concentration (1000 μg ml - 1), TiO2 NPs showed the highest antibacterial activity against Escherichia coli and Pseudomonas aeruginosa. NiO NPs showed the highest antibacterial activity against Staphylococcus aureus while CuO NPs showed the highest antibacterial activity against Proteus vulgaris. Results also indicated that metal oxide nanoparticles and amoxicillin would have a synergistic effect on inhibiting of bacterial growth. Amoxicillin showed inhibitory rate about 74.8% against Escherichia coli and 76.28% against Staphylococcus aureus. In the case of NiO, CuO and TiO2 nanoparticles at concentration 1000 μg ml - 1 with Amoxicillin, antibacterial activity of Amoxicillin enhanced to about 81.5%, 90% and 81.9% against Escherichia coli and to about 86.9%, 91% and 90.7% against Staphylococcus aureus. Therefore, CuO nanoparticles and amoxicillin have the best synergic effect on inhibiting both bacteria strains. The antibacterial activity of the three metal oxides nanoparticle combined with Amoxicillin was also tested by well diffusion method against Escherichia coli and Staphylococcus aureus. In this method, CuO NPs at concentration 1000 μg ml - 1 along with Amoxicillin showed the highest inhibition zone against Escherichia coli (26.0±1.00 mm), while showed complete inhibition of bacteria against Staphylococcus aureus.

ترسيب اغشية شفافة ـ موصلة بالليزر النبضي تستخدم للتطبيقات الكهروبصرية == Pulsed Laser Deposition Of Some Tco Films For Optoelectronic Applications

Author name: ايفان طارق سالم الويسي
Supervisor name: رائد عبد الوهاب القيسي | بسام غالب رشيد الاوسي
General topic: Laser Science
Specific topic: Laser Science
Degree: Doctorate
University: University of Technology
Language: English
University location: Baghdad
First pages:

دراسة تاثير الليزر على خصائص السليكون المسامي == Study Of Laser Effects On Porous Silicon Properties

Author name: ارينا فرج محمد
Supervisor name: بسام غالب رشيد
General topic: Laser Science
Specific topic: Laser Applications in Physics
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:

تطوير وسيلة لتشخيص البلازما المنتجة بالليزر == Development Of Laser Produce Plasma Digonastic

Author name: منال عبد الواحد المفرجي
Supervisor name: ياس محمد الحديثي
General topic: Laser Science
Specific topic: Laser Applications in Physics
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:

تطوير انموذج طيفي لنظام ضخ ذو كفاءة عالية بوساطة الدايود الليزري == Improvement For A Spectroscopic Model Of Highly Efficient Diode Laser Pumped System

Author name: لينا يشوع مجيد هداية
Supervisor name: شهاب احمد الزبيدي | عدوية جمعة حيدر
General topic: Laser Science
Specific topic: Laser Applications in Electronics and Communications Engineering
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:

دراسة جهد منطقة ريشة البلازما المتولدة من تفاعل الليزر مع السطوح الصلبة == Potential Studies Of The Plume Media Generated By Laser Interaction With Solid Surfaces

Author name: افان نجم الدين زنكنة
Supervisor name: عبد المطلب ابراهيم احمد
General topic: Laser Science
Specific topic: Laser Science
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:

الخصائص البصرية والكهربائية لجسيمات بلورية فائقة الدقة المحضرة كيميائيا == Optical And Electrical Properties Of Chemically Prepared Nanocrystalline Particles

Author name: خولة صلاح خشان الركابي
Supervisor name: عبد المطلب ابراهيم احمد
General topic: Laser Science
Specific topic: Laser Science
Degree: Doctorate
University: University of Technology
Language: English
University location: Baghdad
First pages:

انتاج السليكون المسامي بالقشط المحتث بالليزر == Production Of Porous Silicon By Laser - Induced Etching

Author name: سما سامي جان
Supervisor name: بسام غالب رشيد
General topic: Laser Science
Specific topic: Laser Applications in Physics
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:

تصنيع ودراسة خصائص كاشف سليكوني يمتلك قمة استجابة عند المنطقة المرئية

Author name: خالد زكريا يحيى
Supervisor name: رائد عبد الوهاب اسماعيل
General topic: Laser Science
Specific topic: Laser Applications in Physics
Degree: Master
University: University of Technology
Language: Arabic
University location: Baghdad
First pages:

تصميم وانجاز منظومة اتصالات متعددة القنوات باستخدام الالياف البصرية == Design And Implementation Of A Multichannel Communication System Using Optical Fibers

Author name: احمد عبد الجبار الكناني
Supervisor name: S. N. Saleh | A. AL-Naimee
General topic: Laser Science
Specific topic: Laser Applications in Physics
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:

تاثير التشعيع بالليزر على خصائص كاشف سليكون مسامي == Effect Of Laser Irradiation On Characteristics Of Porous Silicon Photodetector

Author name: مروة قاسم عبود
Supervisor name: رائد عبد الوهاب اسماعيل
General topic: Laser Science
Specific topic: Laser Applications in Physics
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:

تحضير السليكون المسامي واستخدامه في الخلايا الشمسية == Preparation Of Porous Silicon And It’s Application In Solar Cell

Author name: ياسمين زيدان داود
Supervisor name: علي هادي الحمداني | بسام غالب رشيد
General topic: Laser Science
Specific topic: Laser Applications in Physics
Degree: Doctorate
University: University of Technology
Language: English
University location: Baghdad
First pages:

مراقبة عملية التفاعل المحتث بالليزر == Monitoring Of Laser - Induced Etching Process

Author name: دعاء سليمان جبير
Supervisor name: بسام غالب رشيد
General topic: Laser Science
Specific topic: Laser Applications in Physics
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:

Deposition Of Nanostructure Cu2O Film And Studying Some Of Its Physical Properties

Author name: عبد الستار خضير عباس الغانمي
Supervisor name: Ali M. Mousa Al-Zuhery
General topic: Laser Science
Specific topic: Laser Applications in Physics
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:

تصميم وبناء منظومة اتصالات ليزرية == Design And Construction Of Laser Communication System

Author name: حسام نعمان محمد علي الانصاري
Supervisor name: حيدر عبد الرضا صالح البكري
General topic: Laser Science
Specific topic: Laser Applications in Physics
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:

الخصائص التركيبية الطوبوغرافية والكهربائية للسليكون المسامي المحضر باستخدام اشعاع الليزر == Structural, Morphological And Electrical Properties Of Porous Silicon Prepared Under Laser Illumination

Author name: عدي اركان عباس
Supervisor name: صباح محمد علي
General topic: Laser Science
Specific topic: Laser Applications in Physics
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:

دراسة تحطم خلايا الدم بعد تعرضها الى اشعة الليزر وسبل السيطرة عليه == Study Of The Destruction Of Blood Cells After Irradiation By Laser And The Ways Used To Control It

Author name: ندى سهيل احمد
Supervisor name: جاسم الحلو
General topic: Laser Science
Specific topic: Laser Applications in Physics
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:

بلورات السليكون فائقة الدقة المنتجة بالتنميش الكيميائي الضوئي == Silicon Nano - Crystallites Produced By Photochemical Etching

Author name: علوان محمد علوان
Supervisor name: عبد المطلب ابراهيم
General topic: Laser Science
Specific topic: Laser Applications in Physics
Degree: Doctorate
University: University of Technology
Language: English
University location: Baghdad
First pages:

دراسة اداء ليزر الحالة الصلبة القرصي”Nd:YVO4 “ المضخ بالليزر الثنائي == Performance Study Of Diode Laser Pumped Solid State “Nd : YVO4” Disc Laser

Author name: محمد كريم ظاهر
Supervisor name: عدوية جمعة حيدر | خليل ابراهيم حاجم
General topic: Laser Science
Specific topic: Laser Applications in Physics
Degree: Doctorate
University: University of Technology
Language: English
University location: Baghdad
First pages:

دراسة الخصائص البصرية لجلد الانسان == Study Of Optical Properties Of The Human Skin

Author name: اسراء حسن هادي الورد
Supervisor name: صالح نوري صالح القيسي
General topic: Laser Science
Specific topic: Laser Science
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:

دراسة تاثير المولارية على الخصائص الفيزيائية والتحسسية لاغشية اوكسيد الخارصين المحضرة بتقنية التحلل الكيميائي الحراري == Studying The Effect Of Molarity On The Physical And Sensing Properties Of Zinc Oxide Thin Films Prepared By Spray Pyrolysis Technique

Author name: علي جاسم الجابري
Supervisor name: علي مطشر الزهيري | كاظم حسن حسين
General topic: Laser Science
Specific topic: Laser Science
Degree: Doctorate
University: University of Technology
Language: English
University location: Baghdad
First pages:

نمذجة اللحام بالليزر لسبائك الصلب == Laser Welding Modeling Of Steel Alloys

Author name: سعد عبد العزيز محمد صالح الحديثي
Supervisor name: وليد خلف حمودي | عادل خلف حمودي
General topic: Laser Science
Specific topic: Laser Science
Degree: Doctorate
University: University of Technology
Language: English
University location: Baghdad
First pages:
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