Semiconductor nanostructures for device applications
type: CreativeWork
description: This thesis demonstrates a synthesis and device application of some semiconductors nanostructure. Section 1 layered hexagonal disks of CuO were synthesized on a large scale via low-temperature hydrothermal growth process. The detailed morphological investigations by field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). The detailed structural characterizations of the hexagonal CuO disks were done by high-resolution TEM (HRTEM) and X- ray diffraction (XRD) which confirmed that the synthesized structures possessing well nanocrystalline nature and monoclinic structure. The purity and composition of the synthesized products were examined by using energy dispersive spectroscopy (EDS), elemental mapping and Fourier transform infrared spectroscopy (FTIR). Using UV-Vis spectroscopy at room temperature we obtained indirect and direct band gap values slightly blue shifted to the bulk values. Finally, a plausible growth mechanism has been proposed for the formation of CuO layered hexagonal disks. Section2 reports the fabrication of highly-sensitive, robust, reliable and reproducible 4-nitrophenol (4-NP) chemical sensor based on CuO nanocubes. The structural characterizations confirmed the nanocrystalline nature and monoclinic structure for as-synthesized nanocubes. The optical property of CuO nanocubes exhibits indirect and direct band gap values examined by UV-Vis. spectroscopy at room-temperature. The as-synthesized CuO nanocubes were used as efficient electron mediators for the fabrication of 4-nitrophenol chemical sensor by simple I-V technique. High-sensitivity of ~132.84 ± 0.02 mA.cm-2.(mol L-1)-1 and detection limit of ~5×10-9 mol L-1 in a short response time of ~10.0 s were observed for the fabricated 4-nitrophenol sensor. This work shows that simply synthesized CuO nanostructures have great potential for the fabrication of efficient and reliable chemical sensors. Section3 , we reported the high-yield facile synthesis, detailed…
abstract: This thesis demonstrates a synthesis and device application of some semiconductors nanostructure. Section 1 layered hexagonal disks of CuO were synthesized on a large scale via low-temperature hydrothermal growth process. The detailed morphological investigations by field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). The detailed structural characterizations of the hexagonal CuO disks were done by high-resolution TEM (HRTEM) and X- ray diffraction (XRD) which confirmed that the synthesized structures possessing well nanocrystalline nature and monoclinic structure. The purity and composition of the synthesized products were examined by using energy dispersive spectroscopy (EDS), elemental mapping and Fourier transform infrared spectroscopy (FTIR). Using UV-Vis spectroscopy at room temperature we obtained indirect and direct band gap values slightly blue shifted to the bulk values. Finally, a plausible growth mechanism has been proposed for the formation of CuO layered hexagonal disks. Section2 reports the fabrication of highly-sensitive, robust, reliable and reproducible 4-nitrophenol (4-NP) chemical sensor based on CuO nanocubes. The structural characterizations confirmed the nanocrystalline nature and monoclinic structure for as-synthesized nanocubes. The optical property of CuO nanocubes exhibits indirect and direct band gap values examined by UV-Vis. spectroscopy at room-temperature. The as-synthesized CuO nanocubes were used as efficient electron mediators for the fabrication of 4-nitrophenol chemical sensor by simple I-V technique. High-sensitivity of ~132.84 ± 0.02 mA.cm-2.(mol L-1)-1 and detection limit of ~5×10-9 mol L-1 in a short response time of ~10.0 s were observed for the fabricated 4-nitrophenol sensor. This work shows that simply synthesized CuO nanostructures have great potential for the fabrication of efficient and reliable chemical sensors. Section3 , we reported the high-yield facile synthesis, detailed…
author: Adam, Mohamed Eisa Abaker
language: en
keywords: Semiconductor nanostructures, Copper oxide, Iron oxide, Tin sulphides, Hydrothermal process, Optical band gap, Chemical sensors, Photocataltic degradation, Heterojunction diode, 620.115, Ημιαγώγιμες νανοδομές, Οξείδιο του χαλκού, Οξείδιο του σιδήρου
date published: 2016-08-23T05:49:31Z
date modified: 2026-07-27T20:29:14Z
provider: University of Patras
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: University of Patras

PropertyValue
property ID: Handle
value: http://hdl.handle.net/10889/9543