m.abdallah

M.A.A. Mohamed

Teadching-Assistant -

Faculty of science

Address: Physics Department, Faculty of Science, Sohag University

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Optical, Electrical, and Thermoelectric Properties of Hydrothermally Synthesized Bi2Te3 Nanoflakes

2019 | Keywords thermoelectric, power factor, Optical , Bi2Te3;, optica, Nanostructures, Bi2Te3,
Optical, Electrical, and Thermoelectric Properties of Hydrothermally Synthesized Bi2Te3 Nanoflakes
Thermoelectric power generators are promising for clean energy production through converting the waste heat to electricity in environmentally friendly ways without any noise or pollutants. This work reports a facile method to synthesize Bi2Te3 nanoflakes with an investigation of their structural, optical, and thermoelectric properties. Various techniques such as X-ray diffraction, field emission scanning electron microscope, transmission electron microscope, and ... Read more

Optical and transport properties of few quintuple-layers of Bi2-xSbxSe3 nanoflakes synthesized by hydrothermal method

2019 | Keywords Bi2-xSbxSe3Bi2Se3Thermoelectri,
Optical and transport properties of few quintuple-layers of Bi2-xSbxSe3 nanoflakes synthesized by hydrothermal method
Hydrothermal synthesis as a commonly bottom-up growth method has considerable advantages for manufacturing thermoelectric nanomaterials with advanced thermoelectric properties. However, the hydrothermally synthesized thermoelectric nanostructures often show a low thermoelectric performance due to their low power factor. In this work, we report on using a hydrothermal method for the growth of n-type Bi2-xSbxSe3 nanoflakes with a fixed thickness of ∼16 ... Read more

Effect of the synthesis conditions on the structural, morphological and optical properties of Bi2Te2.7Se0.3 nanoparticles

2018 | Keywords
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 ... Read more

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