أعضاء هيئة التدريس | مواقع أعضاء هيئة التدريس

أ.د.مصطفى توفيق علي احمد

دكتوراه (1992) أستاذ قسم الفيزياء كلية العلوم والدراسات الانسانية بالخرج

الخرج
mou.ahmed@psau.edu.sa

السيرة الذاتية
الأبحاث العلمية

المؤهلات العلمية

أستاذ ................... جهة العمل: كليه العلوم والدراسات الانسانيه – جامعه الامير سطام بن عبدالعزيز تاريخ الالتحاق: 2019 / 2020 م

الاهتمامات البحثية

تحضيرالبلمرات الموصلة ودراسة الخواص الفيزيائية
تحضيرالبلمرات ومتراكباتها ودراسة الخواص الفيزيائية
* دراسة تأثير المعالجة الحرارية (Heat-treatment) وعملية الشد (Stretching) على درجة التبلور (Crystallinity) والصلادة (Microhardness) للبوليمرات ودراسة هذة الخصائص تتم باستخدام عدة دراسات: الميكروسكوب الاليكتروني -المجهر الضوئى المستقطب-الأشعة فوق البنفسجية UV) ،الأشعة السينية (x-ray) وأخيراً بواسطة مقياس الصلادة (Hv).
* دراسة ظاهرة الاسترخاء لثنائي القطب في البوليمرات والتي تحدث إثناء قياس تيار التفريغ المحفز حراريا المعاد الاستقطاب (TSDC) ثم تقنية نموذج التقسيم الحراري Thermal sampling technique . وتحليل النتائج نظريا باستخدام نماذج رياضية – فيزيائية مختلفة بهدف الحصول على معادلة رياضية تصف هذه العمليات. ومن ثم محاولة تطابق النتائج العملية مع النتائج النظرية.
* دراسة خواص العزل الكهربي للبوليمرات ومتركباتها (Dielectric properties of Polymers) وذلك بدراسة
الموصلية الكهربية باستخدام التيار الكهربي المستمر والمتردد.
* دراسة الخواص الميكانيكية
*دراسة إضافة بعض الهاليدات المختلفة إلى بعض البوليمرات ومركباتها
*دراسة الخواص التركيبه باستخدام العديد من التقنيات مثل (X-Ray, IR, UV, DSC, TGA, SEM, TEM)
* تحضير مركبات بوليمرية باستخدام تقنيه النانو . وكذلك الاتجاه الى تحضير مركبات بوليمرية حيوية للاستخدامات الطبية من البيئة.

الأبحاث العلمية

1- Gamma-Ray Induced TSDC Spectrum Changed in ABS Terpolymer for the application in Radiation Dosimetery,
M.D Migahed, M. Hammam, M.T. Ahmed and H.A Ashery,
1st Egypt-British Conf. on Biophys. Cairo University, Egypt (1987) 209.
2- On The Mechanism of D.C. Conductivity in ABS copolymer Thin Films,
M.D Migahed, M. Hammam and M.T. Ahmed
International Atomic Energy Agency and United Nations Educational Scientific and Cultural Organization, International Center for Theoretical (1978)
Mansoura Sci. Bull.15, 39 (1988)
3- Doping dependence of the Electrical Anisotropy of Stretch-Oriented Polyacetylene.
M.T. Ahmed, S. Roth, an M.D. Migahed,
55 Physikertagung und Fruhjahrstagung des Arbeitskreises Festkorperphysik bei der PG, von 8 - 12 April, Munster (1991)
4- D.C. Electrical Anisotropy of Stretch-Oriented Polyacetylene: Doping and Temperature Dependenceو
M.T. Ahmed, S. Roth, an M.D. Migahed,
Electronic Properties of polymers. eds: H. kuzmany, M. Mehring &S. Roth, Springer Verlage Berlin Heidelberg (1992) pp. 112-116.
5- Doping and temperature Dependence of Anisotropic Conductivity in New Polyacetylene,
M.T. Ahmed, A.B. Kaiser, S. Roth, an M.D. Migahed,
J.Phys. D: Appl. Phys. 25,79 (1992).
6- Thermally Stimulated Discharge Current Studies in ABS Thin Films,
M.D. Migahed, M. Hammam and M.T. Ahmed,
Int. Conf. on Condensed Matter: Phys & Application, Univ. of Bahrain (1992), 277.
7- Conduction Phenomena of Chlorinated Polyethylene: Effects of Heat-treatment,
M.D. Migahed, M. Hammam and M.T. Ahmed,
Int. Conf. on Condensed Matter: Phys & Application, Univ. of Bahrain (1992), 283.
8- Iterative Evaluation of Thermally Stimulated Depolarization Current Peak Parameters in Polymers: A dipolar approach to Molecular dipole relaxation
M.D. Migahed, M.T. Ahmed, A. Kotp and I.M. El-Henawy,
J. Appl. Phys. 78(8) 5079 (1995)
9- Distribution relaxation in PEMA/PVC polymer Blends as revealed by hermostimulated depolarization current.
M.T. Ahmed and T. Fahmy,
Polymer Testing, 18, 8 (1999)
10- Influence of Stretching on the Crystallinity and Microhardness of Ethylene Vinylalcohol Copolymer.
M.T. Ahmed
Egyptian J. Solid, 12, 8 (1999)
11- Carrier Transport and Thermally Stimulated Depolarization Current in Iodine Doped Poly (vinyl Chloride)
M.T. Ahmed and T Fahmy
J. polym. Mater., 133-138 (2000).
12- Thermally Stimulated Depolarization Current Studies of the Alfa Relaxation in Poly(methyl methacrylate)/Poly(vinyl Chloride) Blends and its relation to Compensation laws.
M.D. Migahed, M.T. Ahmed, and A. Kotp,
J. physics D:Appl. Phys., 33, 2108) 2000).
13- Alfa Relaxation Study in poly(vinyl chloride)/Poly(ethyl methacrylate) Blends using Thermally Stimulated Current.
T. Fahmy and M.T. Ahmed
Polymer International, 49, 669-6777 (2000)
14- Thermo-kinetic Characteristics of Alfa-Relaxation in Poly(methyl methacrylate)-Poly(vinyl Chloride) Blends.M.D. Migahed, M.T. Ahmed, A. Kotp and I.M. El-Henawy,
M.D. Migahed, M.T. Ahmed, and A. Kotp
J. Polym. Mater. 19, 157-164 (2001)
15- Thermal Induced Structural change Investigated in PVC/PEMA polymer blend.
M.T. Ahmed and T. Fahmy,
Polymer Testing, 20, 477(2001)
16-Synthesis and physical characterization of polypyrrole based conductive composite.
M. D. Migahed, M.T. Ahmed, T. Fahmy and H. R. Hafiz
Project report of conducting polymer composites,
Mansoura University,General administration, Research consideration unit, April (2001) p. 29-39.
17- Structural and relaxation aspects in Azoday-doped ABS Films: TSDC Study.
T. Fahmy, H. R. Hafiz and M.T. Ahmed.
Inter. J. Polymeric Mater., 51: 875-889,(2002)
18-Redctive photopatterning of phyenylene-based polymers
T. Kavic, G. Langer, W. Kern, A. Ruplistch, K. Mahler, F. Stelzer., G. Hayn, R. Saf, E. J. list, E. Zojer M.T. Ahmed, A. Pogantsch, K. F Iskara, T Neger. H. H. Horhold, H. Tillmann, G. Karanzelbinder, E. Toussaere and G. Jakopie
Mat. Resc. Soc. Symp. Proc. Vol. 708, (2002) BB11.3.1
19- Alternating-current conductivity and dielectric relaxation of poly(acrylonitrile butadiene-styrene) terpolymer doped with tetrabutylammonium tetrafluoroborate.
T Fahmy and M.T. Ahmed
Journal of Polymer Materials 20 (4): 367-376. (2003)
20-.Dielectric relaxation behavior studies in amorphous terpolymer of poly(vinyl 20-. Dielectric relaxation behavior studies in amorphous terpolymer of poly(vinyl chloride-co-vinyl acetate-co-2-hydroxypropyl acrylate) using dielectric spectroscopy and thermally stimulated current techniques.
M.D. Migahed, and M.T. Ahmed
Polymer-Plastics Technology and Engineering, 43 (4): 1053-1066 (2004).
21- Computation of TSDC peak parameters in amorphous polymers using Vogel Tammann-Fulcher relaxation model.
M D Migahed, M.T. Ahmed and A E Kotp
Journal of Macromolecular Science-Physics, B44 (1): 43-53 (2005).
22- Alpha relaxation study of poly(vinyl chloride co-vinylacetate-co-2-hydroxypropyl Acrylate
M.T. Ahmed and T. Fahmy,
Polymer-Plastics Technology and Engineering, 44 (8-9): 1559-1572 (2005)
23-Dielectric and Electric modulus of Poly (3-Hydroxy butyrate) Semi-Crystalline Polymer
A E Kotp and M.T. Ahmed
Inter. J. Polymeric Mater., 57: 1075-1082 (2008)
24- Dielectric Relaxation Spectroscopy and AC Conductivity in Copper Chloride Doped Poly(Vinyl Alcohol).
M.T. Ahmed.
Inter. J. Mater, Sci, V(4), No: 1, 25-39 (2009)
25- Thermally Stimulated Discharge Current and Thermal Sampling Studies on Poly(Vinyl chloride-co-vinylacetate-co-2-hydroxypropyl acrylate)/Poly (methyl methacrylate) Blends
M.T. Ahmed
Inter. J. Mater, Sci, V(4), No: 1, 57-61 (2009)
26- Relaxational Study of Poly(Ethyl-mthacrylate) by Thermally Stimulated Depolarization Current, Thermal Sampling Specroscopy: Modified Dipole-Dipole Interaction Theory
M.T. Ahmed
J. Korean Phys.Soc. 57,272(2010).
27- Study of the Relaxation Phenomenon of Poly(Vinyl chloride-co-vinylacetate-co-2-hydroxypropyl acrylate)/Poly(methyl methacrylate) Blends Using TSDC-TS Technique: Dipole-Dipole Interaction Approach.
M.T. Ahmed and T. Fahmy
J. Korean Phys.Soc. Vol. 59, No. 1, 981- 104 ((2011(
28- Dielectric Relaxation Spectroscopy of a Poly (Acrylonitrile-Butadiene Styrene)/Styrene-Acrylonitrile Polymer Blend.
T. Fahmy and M.T. Ahmed
J. Korean Phys.Soc. Vol. 58,6, 1654_1659 (2011)
29- Dipolar relaxation and Relaxation Map analysis of Poly (Vinyl Chloride-co-Vinyl Acetate-co-2-Hydroxypropyl Acrylate) / Poly (Acrylonitrile-Butadiene-Styrene) Polymer Blend.
T. Fahmy, M.T. Ahmed and H. M. Shabanah
Int. J. Pure and Appl. Phys. (IJPAP), (2012)
30- Dielectric Relaxation Spectroscopy and AC Conductivity of Doped Poly (Vinyl Alcohol)
T Fahmy, M.T. Ahmed
Inter. J. Mater. Phys 6, 7-20 ) 2015)
31- Electrical Transport and Magnetoresistance of Doped Polypyrrole
T Fahmy, M.T. Ahmed
International Journal of Engineering and Applied Sciences 2 (1), 56-61(2015)
32- Quality control of CT image using American College of Radiology (ACR) phantom
Z Mansour, A Mokhtar, A Sarhan, M.T. Ahmed, T El-Diasty
The Egyptian Journal of Radiology and Nuclear Medicine 47 (4), 1665-1671 (2016)
33-Effect of thermal oxidation process on emitter profiling and solar cell performance
A Habib, V Fano, MA Rasool, A Otaegi, JR Gutierrez, JC Jimeno, M.T. Ahmed..
IEEE 43rd Photovoltaic Specialists Conference (PVSC), 0639-0642 (2016)
34- AC Conductivity and Dielectric Spectroscopy of Poly (3-hydroxybutyrate-co-3-hydroxyaclerate)
T Fahmy, M.T. Ahmed, A Sarhan, HG Abdelwahed, M Alshaaer
International Journal of Applied Engineering Research 11 (18), 9279-9288 (2016).
35- Preparation and Characterization of ZnO Nanoparticles by Simple Precipitation Method
M.T. Ahmed, MI Abd-Elhamid, A Sarhan, A Hassan
International Journal of Science, Engineering and Technology 4, Issue 3 (2016).
36- Broadband Dielectric Spectroscopy and Electric Modulus Analysis of Poly (3-hydroxybutyrate co-3-hydroxyvalerate) and Related Copolymers Films
T Fahmy, M.T. Ahmed, A El-kotp, HG Abdelwahed, MY Alshaeer
International Journal of Physics and Applications 8 (1), 1-14 (2016).
37- Radiation induced bystander effects in the spleen of cranially-irradiated rats
A.A. Mohye El-Din, A.B. Abdelrazzak, M.T. Ahmed, MA El-Missiry
British journal of radiology 90, 20170278 (2017)
38- Thermal Sampling and Compensation Phenomena of PVVH/ZnO Nanocomposite Polymer Using TSDC Technique.
M.T. Ahmed, M. I Abd-Elhamid, A. Sarhan, A. Hassan.
Modern Chemistry 5 (4), 60 (2017).
39- Morphology and FTIR of Polypyrrole Doped Toluene-4-Sulfonate
T. Fahmy, I. A. Elsayed, A. Sarhan, M.T. Ahmed
Global Journal of Physics Vol 6 (1) (2017)
40- The effect of quality control on the function of magnetic resonance imaging (MRI), using
American College of Radiology (ACR) phantom
HM Etman, A Mokhtar, MI Abd-Elhamid, M.T. Ahmed, T El-Diasty
The Egyptian Journal of Radiology and Nuclear Medicine 48 (1), 153-160 (2017)
41- Characteristic and thermal stimulated depolarization current of poly (vinyl chloride-co-vinyl acetate-co-2-hydroxy propyl acrylate) Zinc nanocomposite
M.T. Ahmed, MI Abd-Elhamid, A Sarhan, A Hassan
Global Journal of Physics 5 (2), 585-594 (2017)
42- El algorithms in intensity modulated radiotherapy technique for breas Key words: Algorithms
M.T. Ahmed, MI Abdel-Hamid, EA Hegazy
International Journal of Current Research , 9 (11), .60948-60954 (2017)
43- Structure and dynamics of polypyrrole/chitosan nanocomposites
A. A Ali, M. M Elmahdy, A. Sarhan, M. I Abdel Hamid, M.T. Ahmed
Polymer International 67 (12), 1615-1628 (2018).
44- Effect of UV Irradiation on The Structure and Optical Properties of PVA/Cucl2
T. Fahmy, A. Sarhan. A, Elsayed M.T. Ahmed
Journal of Advances in Physics, 14, 2, 5338 (2018).
45- Synthesis and Structural Characterization of Polypyrrole (PPy)-Chitosan (Cs) Nanocomposite Influence of UV Irradiation
M.T. Ahmed M. I. A Hamid, A Sarhan, A. A. Ali
Global Journal of Physics Vol 7 (1) (2018)
46 -Role of silica nanoparticles on structural, optical and morphological properties of poly (vinyl chloride-co-vinyl acetate-co-2-hydroxypropyl acrylate) copolymer
M. Abdelghany, M. A. Morsi, A. Abdelrazek, M.T. Ahmed
Silicon 10 (2), 519-524 (2018).
47- Comparisons between Three Algorithms in Left-Side Breast Cancers Using Three-Dimensional
Conformal Radiotherapy Technique
E. A. Hegazy, E. O. Abdel-Muttalib, M.T. Ahmed, M. I. Abdel-Hamid,
Cancer Biology 2018 8 (1), 9-17 (2018).
48- Evaluation of different planning methods of 3DCRT, IMRT, and RapidArc for localized
prostate cancer patients: planning and dosimetric study
AS Shawata, MF Akl, KM Elshahat, NA Baker, M.T. Ahmed
Egyptian Journal of Radiology and Nuclear Medicine 50 (1), 1-8 (2019).
49- Effect of low-dose X-rays on the liver of whole-body irradiated rat
A. B. Abdelrazzak, M. A. El-Missiry, M. T. Ahmed, B. F. Elnady
International journal of radiation biology 95 (3), 264-273 (2019).
50- Preparation, Characterization and Antibacterial Efficiency of Olive Leaves Extract and Chitosan-Silver Nanoparticles using Electrochemical Method.
M.T. Ahmed , A. Sarhan, R. Hanie
Journal of Advances in Physics 15, 6152-6164 (2019).
51. Verification of IMRT and RapidArc Localized Prostate Cancer Treatment Plans Using EPID and Delta4 in vivo Dosimetry Methods.
M. T. Ahmed, N. A. Baker, K. M. El-Shahat, M. F. Akl, A. S. Shawata‏
Middle East Journal of Cancer (2010)
52. Suggested Template Plan for Forward Intensity Modulated Radiotherapy in Head and Neck Cancer Patients‏
M. T. Ahmed, N. A. Baker, K. M. Elshahat, M. F. Akl, A. S. Shawata‏
Middle East Journal of Cancer 12 (1), 128-136 (2021)
53. TSDC of Irradiated and Non-Irradiated Cellulose Acetate‏
T Fahmy, EO Abdelmuttlib, MI Abdelhamid, WB Elsharkawy, ZM Elqahtani,
Egyptian Journal of Chemistry

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مواقع أعضاء هيئة التدريس

أ.د.مصطفى توفيق علي احمد

المؤهلات العلمية

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الأبحاث العلمية

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مواقع أعضاء هيئة التدريس

أ.د.مصطفى توفيق علي احمد

المؤهلات العلمية

الاهتمامات البحثية

الأبحاث العلمية

إدارة العلاقات العامة والإعلام