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Article
Surface Plasmon Resonance Based Fiber Optic Sensor: Theoretical Simulation and Experimental Realization

Authors: Murtadha Faaiz Sultan --- Ali A. Al-Zuky --- Shehab A. Kadhim
Journal: Al-Nahrain Journal of Science مجلة النهرين للعلوم ISSN: (print)26635453,(online)26635461 Year: 2018 Volume: 21 Issue: 1 Pages: 65-70
Publisher: Al-Nahrain University جامعة النهرين

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Abstract

Surface plasmon resonance (SPR) based fiber optic sensor with two types of plasmonic metals (gold and silver) are theoretically studied and implemented experimentally. Performance characteristics like sensitivity, signal to noise ratio, the figure of merit, and resolution are evaluated for both simulated and fabricated sensor. The results of theoretical and experimental studies and also between the sensor with the gold layer and that with silver have been compared. Sensitivity is larger for the sensor with the gold layer while the signal to noise ratio and figure of merit are larger for the sensor with the silver layer for both the experimental and theoretical studies. The resolution is slightly larger for the sensor with the gold layer and there is some difference between the resolution of the simulated and that of the fabricated sensor


Article
Performance Parameters Evaluation of Surface Plasmon Resonance Based Fiber Optic Sensor with Different Bilayer Metals: Theoretical Study

Authors: Murtadha F. Sultan --- Ali A. Al-Zuky --- Shehab A. Kadhim --- Anwar H. Al-saleh
Journal: Al-Mustansiriyah Journal of Science مجلة علوم المستنصرية ISSN: 1814635X Year: 2018 Volume: 29 Issue: 1 Pages: 195-203
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

Surface plasmon resonance (SPR) based fiber optic sensor with three types of bilayer configurations (silver/gold, copper/gold, and aluminum/gold) is theoretically analyzed. Performance parameters like sensitivity, signal to noise ratio, figure of merit, and resolution are evaluated for each configuration. Signal to noise ratio (SNR), and figure of merit (FOM) are enhanced very well for the selected bilayer configurations as the outer gold layer thickness increased, the sensitivity enhanced also but with small frictions while the resolution has decreased slightly.

تحسس رنين بلازمونات السطح المعتمدة على الالياف البصرية مع ثلاث هيئات متعددة الطبقات (فضة/ذهب ، نحاس/ذهب، المنيوم/ذهب) قد تم تحليله نظريا. معلمات الاداء مثل الحساسية، نسبة الاشارة الى الضوضاء، مقياس الاداء، قدرة الفصل تم حسابها لكل هيئة. تم تحسين SNR و FOM بشكل جيد للهيئات الثلاث كلما زاد سمك طبقة الذهب الخارجية ، الحساسية كذلك تم تحسينها ولكن بجزء قليل بينما انخفضت قدرة الفصل قليلا.


Article
Easy and New Chemical Synthesis of Stable Nano Sliver using Propylene Glycol and Glycerin as Reducing Agents

Authors: Abdulah A. Mohammed --- Sarab T. Mahmood
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2018 Volume: 36 Issue: 2 Part (B) Engineering Pages: 131-135
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

In this present work we have synthesized stable silvernanoparticles (Ag-NPs) by chemical reduction with aqueous solutions ofsilver nitrate (i) propylene glycol (ii) glycerin as reducing agents and guargum as a stabilizer. The reaction were done at room temperature and atpH=8. Systematic characterizations of the Ag-NPs were done using UV-Vis,zeta potential analysis, X-Ray diffraction (XRD), AFM and SEM whichreveal stable Ag-NPs. These measurements indicate that the particles aremostly spherical in shape. The UV-Vis spectra of the result solution of AgNPsshow an absorption peak at 412 nm and 424 nm for using propyleneglycol and for using glycerin respectively. These color occurring due toSurface Plasmon Resonance (SPR). The SEM measurements gave a particlesize of 40 -70 nm. Nano silver showed stability for long periods of time tomore than nine months, and this can be an economical and effective way forwide scale synthesis of Ag-NPs which applicable for various medicaltherapies.


Article
Synthesis and Characterization of Copper Nanoparticles by Chemical Method Using Ascorbic acid as a Reducing Agent in Presence of Metronidazole Benzoate (MTZ.B) (1-(2-benzyloxy ethyl)-5-nitro methyl imidazole) Drug
تحضير وتشخيص دقائق النحاس النانوية بطريقة كيميائية باستخدام حامض الاسكوربك كعامل مختزل بوجود دواء ميترونيدازول بنزويت (1- (2- بينزيل اوكسي اثيل)-5-نايترو ميثيل اميدازول)

Author: May Joda Kreim
Journal: journal of the college of basic education مجلة كلية التربية الاساسية ISSN: 18157467 Year: 2018 Volume: 24 Issue: 101/ علمي Pages: 97-112
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

Copper nanoparticles (Cu NPs) have synthesized via reduction of copper (II) sulfate pentahydrate salt (Cu SO4 .5H2O) using ascorbic acid as reducing and polyvinyl pyrrolidone PVP (M.Wt 10,000) as a stabilizing agents in presence of Metronidazole Benzoate (MTZ.B) (1-(2-benzyloxy ethyl)-5-nitro methyl imidazole) drug by chemical method. The resulting Cu NPs were characterized by "UV–Vis spectroscopy, atomic force microscopy (AFM), X-ray diffraction (XRD) and FT-IR spectroscopy".

تم تحضير دقائق النحاس النانوية بطريقة كيميائية باستخدام كبريتات النحاس المائية (Cu SO4 . 5H2O) بوجود حامض الاسكوربيك كعامل مختزل و pvpعامل استقرارية مع دواء ميترونيدازول بنزويت بطريقة كيميائية. شخصت الدقائق النانوية الناتجة بواسطة مطيافية الاشعة فوق البنفسجية- المرئية وتحاليل مجهر القوى الذرية, وحيود الاشعة السينية و مطيافية .FT-IR-

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