a.abdelhakeem

احمد محمد عبدالحكيم فرج

استاذ مساعد - لا يوجد

كلية العلوم

العنوان: قسم الفيزياء - كلية العلوم - جامعة سوهاج

4

إعجاب

الاسم: احمد محمد عبدالحكيم فرج

سنة التعيين: 1998

التخصص: فيزياء الجوامد التجريبية

الدرجة الوظيفية: أستاذ مساعد


2018-09-24 10:18:58 | الكلمات المفتاحية electrical conductivitymagnete,
1-	Effect of Fe doping on the electrical and magnetic properties of Sn1-xFexO2 nanoparticles
Metal oxides attract great interest of enormous research groups because of the broad range of their important technological properties. Particularly, tin dioxide (SnO2) presents itself as one of the promising materials where it possesses various properties suitable for fabrication of different efficient electronics and optoelectronics devices such as transparent conducting electrodes [Mishra R.K. 2012, and Saleh S.A. 2008], solar cells ... إقراء المزيد

2018-09-24 10:32:04 | الكلمات المفتاحية optical properties,
Characterization of n and p-type (SnO2)x(ZnO)1–x nanoparticles thin films
Transparent conductive oxide (TCOs) materials still occupy the attention of many scientific researchers because of their important properties including high transmittance and high electrical conductivity. The doping process whether intrin_s_ic or extrinsic materials. For example, elements of Group-III doped ZnO (B,Al,In,Ga) and group IV (Sn,Pb) has led to changes in optoelectronic properties [An H., 2014, Mahmoud W.E.,2011, Bae S.Y.,2005, Lee ... إقراء المزيد

2018-09-24 10:36:11 | الكلمات المفتاحية Transpot propertiespower facto,
Transport Properties of the System Bi2Te2.7 Se0.3-xPbx Fabricated by a Conventional Melting Technique
Since the discovery of thermoelectricity by Thomas Johann Seebeck (1770-1831), thermoelectric generators (TEGs) devices have attracted the interest of a lot of scientists due to their unique dual capability of directly converting heat to electricity or electrical power into cooling or heating. Although intensive efforts have been made to produce new materials with enhanced thermoelectric properties, the Bi2Te3 or PbTe ... إقراء المزيد

2018-09-24 10:38:02 | الكلمات المفتاحية optical properties nano wires,
Synthesis, photoluminescence and optical constants evaluations of ultralong CdO nanowires prepared by vapor transport method.
Low dimensional (0D and 1D) nanoscale semiconducting metal oxide materials have attracted much attention because they have new functional properties and numerous applications [Zirak M. 2014, Comini E. 2013, and Kulyk B. 2010]. Since one-dimensional (1D) cadmium oxide (CdO) such as nanowires (NWs), as an important n-type semiconductor metal oxide, has also widely investigated owing to its potential applications in ... إقراء المزيد

2018-09-24 10:39:53 | الكلمات المفتاحية thermoelectric materialselectr,
Structural, Electrical and Thermoelectrical Properties of (Bi1-xSbx)2Se3 Alloys Prepared by a Conventional Melting Technique
Thermoelectric materials can transform the temperature gradient to electric power or vise versa according to Seebeck effect or Peltier effect, respectively. They are considered as sources of green power, reliable energy converters and have no environmentally harmful fluids, noise or vibrations. Also devices based on this technology can be manufactured in very small sizes, which enable application to very local ... إقراء المزيد

2018-09-24 12:50:52 | ديناميكا حرارية
تمارين على القانون الاول للديناميكا الحرارية
1- أذكر نص الثانون الأول للديناميكا الحرارية؟ 2- اكتب أهم تطبيقات القانون الاول للديناميكا الحرارية فى حياتنا العملية؟ إقراء المزيد