e.ibrahim

اسلام محمد محمد ابراهيم الشيخ

استاذ - رئيس قسم الفيزياء

كلية العلوم

العنوان: قسم الفيزياء كلية العلوم

7

إعجاب

Prof. Dr. Eslam Mohamed Ibrahim had born 1975 in Egypt. He completed his Master and doctorate in High Tc superconductivity at Sohag University, Egypt in 2000 and 2002, respectively. After that, he joined the Soahg University as a lecturer of physics in 2003 till 2008 and as an associated professor of physics in 2008. 2008-2012, he was invited by Leibniz Institute for Solid State and Materials Research Dresden (IFW-Dresden), Germany as a scientific researcher to work in the field of synthesis and characterization of Carbon nanotube and Carbon coated magnetic nanoparticles. From 2013 till now he has a position as a professor of materials science at Sohag University. Prof. Ibrahim has published more than 80 papers in highly ranked journals and international conferences. Also, he supervised more than 20 MSc and PhD students. He presented several talks as an invited speaker at national and international universities and research institutes. He is a referee in more than 20 international journals. His research interests are metal oxide nanostructures, different shaped carbon nanostructures, thermoelectric nanomaterials and magnetic nanoparticles.    


2018-09-26 22:15:26 | الكلمات المفتاحية bulk chalcogenides, thermoelec,
Thermoelectric properties of Te doped bulk Bi2Se3 system
Polycrystalline bulk samples of Bi2(Se1−xTex)3 system with x=0.0–0.9 were prepared by the conventional melting method. Successfully and cheaply, Se atoms were replaced by Te atoms to get Bi2Se3-Bi2Te3 or even Bi2Te3 alone. Difference of mass and size between Te and Se atoms is expected to result in interesting properties in the Bi2(Se1−xTex)3 system. All compounds showed a metalsemiconductor conductivity transition. ... إقراء المزيد

2018-09-26 22:24:03 | الكلمات المفتاحية Bi2Te3 Physical vapour deposit,
Effect of the synthesis conditions on the structural, morphological and optical properties of Bi2Te2.7Se0.3 nanoparticles
Beside their promising utility as thermoelectric generators, Bi2Te3 and related compounds have several applications in electronic and optoelectronic devices. In this work, Bi2Te2.7Se0.3 nanoparticles (NPs) were successfully prepared via physical vapor deposition technique at different conditions of flow rate and temperature. The x-ray diffraction patterns show that, the NPs crystallize in a rhombohedral crystal structure with preferable growth along the ... إقراء المزيد

2018-09-26 22:26:09 | الكلمات المفتاحية Bismuth selenide; nanocrystals,
Optical And Thermoelectric Properties Of Nanocrystalline Bi2(Se1-xTex)3 Films
Granular nanocrystalline Bi2(Se1-xTex)3 films were prepared from highly crystalline bulk alloys used as source materials by means of thermal evaporation under vacuum (2 × 10−6 mbar). The nanofilms were deposited onto highly cleaned glass substrates of BK7 type. The structural characteristics, including surface morphology, roughness, and crystallite size, were studied by X-ray diffraction (XRD), atomic force microscopy (AFM), and transmission ... إقراء المزيد

2018-09-26 22:28:16 | الكلمات المفتاحية Fe2O3 Co3O4 Spinel Magnetic El,
Electric, thermoelectric and magnetic characterization of γ-Fe2O3 and Co3O4 nanoparticles synthesized by facile thermal decomposition of metal-Schiff base complexes
Using novel compounds for synthesis of metal oxide nanomaterials can tune their physical properties due to the associated variation in the shape, size and crystallinity. In this work, γ-Fe2O3 and Co3O4 nanoparticles were successfully prepared by a facile thermal decomposition route, employing [Fe(C32H22N4O2)]·2H2O and [Co (C16H11N3O4)].1 2H2O complexes, respectively as new precursors. The x-ray diffraction and high resolution transmission electron ... إقراء المزيد

2018-09-26 22:31:10 | الكلمات المفتاحية Ni-Schi® base complexes; elect,
Electric, Thermoelectric and Magnetic Properties of Nickel(II) Imine Nanocomplexes
Production of novel organic semiconductor nanomaterials is essential for enabling the development of personal, portable and °exible electronic modules. This work presents Ni(II)-Schi® base complexes with enhanced Seebeck coe±cient and weak ferromagnetic ordering for thermoelectric and magnetic devices. Four Ni(II)-Schi® base complexes (namely [Ni(C12H10N3O4Br)]2H2O, [Ni(C16H11N3O4 Þ]2H2O, [Ni(C21H14N5O8Br)] and [Ni(C25H17N5O8 Þ]1=2H2O) have been synthesized in nanosized dimensions. The electrical and thermoelectric ... إقراء المزيد