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Preparation and a Study the Optical Properties of a Mixture of Magnesium Oxide and Ferrous Oxide by UV-Vis Technique
Mahmoud Hamid Mahmoud Hilo,
Sarra Mohammed Jamalalden Ahmed
Issue:
Volume 9, Issue 1, June 2022
Pages:
1-5
Received:
10 December 2021
Accepted:
5 January 2022
Published:
12 January 2022
DOI:
10.11648/j.ijhep.20220901.11
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Abstract: The physical and chemical properties of metal oxides give them a very significant role in various industries. Many of these oxides considered as the raw materials for many technological applications, from paints, mirrors, ceramics and steel. Most of these oxides fall within the range of semiconductors; they are thus used in the manufacture of electronic devices such as diodes, transistors, integrated circuits and solar cells. Some of oxides when they get mixed together they produce a material with enhanced optical properties. Thus, this research aims to form a mixture from Ferrous oxide and Magnesium oxide to produce a material with better optical properties that can be used in various applications. One sample of magnesium oxide MgO, One sample of ferrous oxide FeO and 4 samples of a mixture of magnesium oxide and ferrous oxide FexMg(1-x)O2 were prepared using the sol-gel method. Then these samples were tested in a UV-Vis spectrometer, and then the optical properties (Absorption - Reflection - Transmittance - Absorption coefficient - Extinction coefficient - Energy gap) were found as functions of wavelength. The results showed that there is an improvement in the absorption of the mixture samples to ultraviolet radiations compared to the absorption of the pure ferrous oxide, as it have a very high absorption (0.99au), a low transmittance (0.11%), and a negative value of reflection (-0.051%). The mixture samples are closer to the ideal semiconductor energy gap compared to the pure iron oxide energy gap. Therefore, the material FexMg(1-x)O2 can be used as a semiconductor material used in the electronics industry, rather, it can be used as a filter for ultraviolet rays due to its high absorption of it.
Abstract: The physical and chemical properties of metal oxides give them a very significant role in various industries. Many of these oxides considered as the raw materials for many technological applications, from paints, mirrors, ceramics and steel. Most of these oxides fall within the range of semiconductors; they are thus used in the manufacture of elect...
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Studying the Optical Properties of Cadmium Acetate Thin Films by UV-Vis Technique
Mahmoud Hamid Mahmoud Hilo,
Amna Babikir
Issue:
Volume 9, Issue 1, June 2022
Pages:
6-12
Received:
10 December 2021
Accepted:
5 January 2022
Published:
12 January 2022
DOI:
10.11648/j.ijhep.20220901.12
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Abstract: The optical and electrical properties of materials are very important in classifying them, and improve their uses; the Cadmium acetate is used for glazing ceramics and pottery; in electroplating baths, in dyeing and printing textiles; and as an analytic reagent for sulfur, selenium and tellurium. The use of Cadmium acetate in the bulk form is clear, but few studies only try to treat it the different scales. In this paper, thin films of the cadmium acetate compound were prepared in nanoparticles by a chemical thermal fracture method. Three samples of 5.6, 14.1 and 20.6 nm were prepared respectively. The ultraviolet device was used to study the optical properties of the prepared samples. All optical properties were determined as a function in the wavelength and the cadmium cells were found to have excellent optical properties, especially with respect to the static energy gap with membrane thickness change, as well as the good electrical and optical conductivity of the samples the use of cadmium acetate in many electronic applications.
Abstract: The optical and electrical properties of materials are very important in classifying them, and improve their uses; the Cadmium acetate is used for glazing ceramics and pottery; in electroplating baths, in dyeing and printing textiles; and as an analytic reagent for sulfur, selenium and tellurium. The use of Cadmium acetate in the bulk form is clear...
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Polaritonic Crystal Formed by a Tunnel Connected Array of Microcavities Containing Ensembles of Quantum Dots
Vladimir Rumyantsev,
Stanislav Fedorov,
Kostyantyn Gumennyk,
Alexey Rybalka
Issue:
Volume 9, Issue 1, June 2022
Pages:
13-19
Received:
7 December 2021
Accepted:
27 December 2021
Published:
28 January 2022
DOI:
10.11648/j.ijhep.20220901.13
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Abstract: Numerical model for a defect-containing lattice of microcavities with embedded ultracold atomic clusters (quantum dots) is developed. It is assumed that certain fractions of quantum dots are absent, which leads to transformation of polariton spectrum of the overall structure. Using the virtual crystal approximation based on the diagonalization of the averaged Hamiltonian of the system, dispersion relations for polariton modes are derived. The group velocity of polariton excitations in the structure under study is calculated depending on the structure defects concentrations and elastic strain. It is shown that, as a result of elastic strain of the system and presence of structural defects under study, it is possible to achieve necessary changes in its energy structure (and, therefore, optical properties) determined by the rearrangement of the polariton spectrum. This results in formation of slow light mode that can be efficiently controlled by the externally applied strain. The obtained results demonstrate the possibility of controlling the group velocity of excitations, which is responsible for signaling rates in optical integrated circuits of optoelectronic devices. Numerical simulations performed on the basis of the constructed model contribute to modeling of the new class of functional porous materials, namely the so-called polaritonic systems (microcavity arrays with embedded quantum dots) where controlling of propagation of electromagnetic excitations is accomplished by an appropriate introduction of structural defects and elastic deformation.
Abstract: Numerical model for a defect-containing lattice of microcavities with embedded ultracold atomic clusters (quantum dots) is developed. It is assumed that certain fractions of quantum dots are absent, which leads to transformation of polariton spectrum of the overall structure. Using the virtual crystal approximation based on the diagonalization of t...
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Synthesis and a Study the Optical Properties of Yttrium Barium Copper Oxide (YBCO) Using UV-Vis Techniques
Mahmoud Hamid Mahmoud Hilo,
Jihan Shams Eldeen Shaheen
Issue:
Volume 9, Issue 1, June 2022
Pages:
20-24
Received:
7 January 2022
Accepted:
3 February 2022
Published:
18 March 2022
DOI:
10.11648/j.ijhep.20220901.14
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Abstract: Yttrium barium copper oxide (YBCO) is a family of ctaline chemical compounds, famous of displaying high temperature super conductivity. It includes the first material lever discovered to become superconducting above the boiling point of liquid nitrogen (77K) at about 92K. The physical and chemical properties of metal oxides give them a very significant role in various industries. The aim of this study is to prepare three samples of (YBCO) in laboratory, and then to characterize them to determine their optical properties, its importance brake out as it acts in scope of a super conductor, and then to study the characteristics of (YBCO) using the UV-Vis device. Three samples of the composite by different percentage (100, 90, and 80)% of Yttrium oxide with chemical extenuation method were prepared. The optical properties of the samples (the absorbance, absorption coefficient, transmittance, reflectance and energy gap) had been studied with UV-Vis spectrometer. Results found show that all the optical properties of the compound act in the range of UV only, and the absorbance decreases with the decreasing of the YO percentage, transmittance, and reflectance increase with the decreasing of YO percentage in the sample. The energy gap showed very good results that undergoes with the opinion of superconductivity in which a superconducting materials must have a very small energy gap which found to be in the range of 0.0035 eV to 0.0045 eV.
Abstract: Yttrium barium copper oxide (YBCO) is a family of ctaline chemical compounds, famous of displaying high temperature super conductivity. It includes the first material lever discovered to become superconducting above the boiling point of liquid nitrogen (77K) at about 92K. The physical and chemical properties of metal oxides give them a very signifi...
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