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Articles 1 - 9 of 9
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Nanostructured Cu-Zn Electrode Materials For Green Hydrogen Production, Rahma Leil
Nanostructured Cu-Zn Electrode Materials For Green Hydrogen Production, Rahma Leil
Theses and Dissertations
The continuity of human civilization heavily depends on securing sources of energy. After the 1970s energy crisis, scientists and engineers are meticulously looking for fuels that are alternatives to fossil fuels. Hydrogen can store solar energy to be further used as a fuel. One of the renewable ways to produce hydrogen is Photoelectrochemical (PEC) water splitting. PEC water splitting is a promising way to produce green hydrogen. However, one of the bottlenecks in realizing scalable green hydrogen production systems is the inability to identify and fabricate earthabundant, stable, and durable photocathodes. The main challenges with the reported photocathodes so far …
The Effect Of Mechanical Strain On The Electronic Conductivity Of Α- Fe2o3: A Density Functional Theory Study, Sheriff Naziru Abdulmutalib
The Effect Of Mechanical Strain On The Electronic Conductivity Of Α- Fe2o3: A Density Functional Theory Study, Sheriff Naziru Abdulmutalib
Theses and Dissertations
Hydrogen has emerged as a promising future energy carrier due to its ability to produce zero carbon dioxide (CO2) emissions when burned. However, the limited natural abundance of hydrogen necessitates the development of cost-effective and environmentally friendly methods for large-scale hydrogen production. Among the different hydrogen production approaches, photoelectrochemical water splitting, which employs a photoanode material in a cell using solar energy to split water into hydrogen and oxygen, is the focus of this work. α-Fe2O3 (hematite) is a photoanode material that shows a promising future for hydrogen generation in a photoelectrochemical cells due to its cheapness, availability, and its …
Atomistic Assessment Of Drug-Phospholipid Interactions Consequent To Cancer Treatment: A Study Of Anthracycline Cardiotoxicity, Yara Elsayed Ahmed
Atomistic Assessment Of Drug-Phospholipid Interactions Consequent To Cancer Treatment: A Study Of Anthracycline Cardiotoxicity, Yara Elsayed Ahmed
Theses and Dissertations
Despite being one of the most effective chemotherapeutic agents developed to date, Anthracyclines are notorious for their cardiotoxicity. Their clinical use is frequently limited both in dosage and in prescription due to the severe cardiac damage they cause. The mechanism of anthracycline-induced cardiotoxicity is not yet fully understood. However, it is hypothesized that interactions with the myocardial membrane play an important role in imparting cardiotoxicity. In this study, we use molecular dynamics simulations and density functional theory calculations to study the anthracycline drug molecules and the interactions that they have with the myocardial membrane. We construct a myocardial membrane model …
Role Of Defect Type In Optimizing Photoelectrochemical Hydrogen Production Catalysts, Mohamed Mahrous
Role Of Defect Type In Optimizing Photoelectrochemical Hydrogen Production Catalysts, Mohamed Mahrous
Theses and Dissertations
The search for new energy sources has become a global challenge due to the increasing demand for energy and the negative impact of traditional energy sources on the environment. The photoelectrochemical water splitting has emerged as a promising alternative source for producing hydrogen, which can be used as a clean fuel. However, it is necessary to tailor the properties of the light-active material that will be used to absorb sunlight and split water. This research project aimed at providing detailed insights into the effect of varying the type and concentration of defects on the optical and electronic properties of diamond …
Quantum Capacitance Investigation Of Different Tas2 Polymorphs For Energy Storage Applications – First Principles Study, Mahmoud Elattar
Quantum Capacitance Investigation Of Different Tas2 Polymorphs For Energy Storage Applications – First Principles Study, Mahmoud Elattar
Theses and Dissertations
Energy is an essential requirement, which has a growing demand due to the growth of population and the world transformation into electronic. More than 70% of energy resources are fossil-fuel based which has an environmental impact due to the CO2 emissions. Energy hubs for Fossil-fuel to electric energy conversion, controlled CO2 emissions processing units, and energy storage system are key factors for a smooth transition to green energy without lack of energy supplies, where electrical energy storage systems (ESS) are key enablers to achieve that. One of the effective components which determines the ESS efficiency is the electrode …
A Comprehensive Comparison Between Design For Testability Techniques For Total Dose Testing Of Flash-Based Fpgas, Mohamed Ayman Ahmed Ibrahim
A Comprehensive Comparison Between Design For Testability Techniques For Total Dose Testing Of Flash-Based Fpgas, Mohamed Ayman Ahmed Ibrahim
Theses and Dissertations
Radiation sources exist in different kinds of environments where electronic devices often operate. Correct device operation is usually affected negatively by radiation. The radiation resultant effect manifests in several forms depending on the operating environment of the device like total ionizing dose effect (TID), or single event effects (SEEs) such as single event upset (SEU), single event gate rupture (SEGR), and single event latch up (SEL). CMOS circuits and Floating gate MOS circuits suffer from an increase in the delay and the leakage current due to TID effect. This may damage the proper operation of the integrated circuit. Exhaustive testing …
Testing Of Leakage Current Failure In Asic Devices Exposed To Total Ionizing Dose Environment Using Design For Testability Techniques, Assem Mohamed Alaa El Din Ali Mohamed
Testing Of Leakage Current Failure In Asic Devices Exposed To Total Ionizing Dose Environment Using Design For Testability Techniques, Assem Mohamed Alaa El Din Ali Mohamed
Theses and Dissertations
Due to the advancements in technology, electronic devices have been relied upon to operate under harsh conditions. Radiation is one of the main causes of different failures of the electronics devices. According to the operation environment, the sources of the radiation can be terrestrial or extra-terrestrial. For terrestrial the devices can be used in nuclear reactors or biomedical devices where the radiation is man-made. While for the extra- terrestrial, the devices can be used in satellites, the international space station or spaceships, where the radiation comes from various sources like the Sun. According to the operation environment the effects of …
Physical And Biological Insights Of Nanostructured Ti-8mn Alloy For Coronary Drug Eluting Stent Material, Alaa Mohyeldin Soliman
Physical And Biological Insights Of Nanostructured Ti-8mn Alloy For Coronary Drug Eluting Stent Material, Alaa Mohyeldin Soliman
Theses and Dissertations
According to the World Health Organization (WHO), cardiovascular diseases (CVDs) are the main cause of death worldwide. Coronary Artery Disease (CAD) is the common cause of heart failure. In CAD, lipids and fats that are circulating with the blood may get accumulated within the injured arteries' walls and restrict the blood flow to the myocardium, which in turn results in atherosclerosis. Since the approval of Drug Eluting Stents (DES) by the Food and Drug Administration (FDA) as a treatment option for CAD, multidisciplinary research is being conducted to introduce biomaterials with adequate physical properties as well as excellent clinical outcomes. …
First Principles Insights On Co Adsorption On Metal Surfaces, Kareem Gameel
First Principles Insights On Co Adsorption On Metal Surfaces, Kareem Gameel
Theses and Dissertations
Density functional theory (DFT) has been regularly exploited for meticulous studying of complex surface interactions at a molecular orbital scale. However, DFT calculations usually yield inaccurate thermodynamics results that contradict experimental findings. A clear example is the CO adsorption puzzle caused by the wrong estimation of adsorption sites, especially for the (111) transition metal surfaces. The puzzle is still not fully resolved and a complete adsorption picture is yet to be reported. Herein, we demonstrate the reliability of DFT calculations for the study of local bond properties, despite the wrong energetics predictions. We also highlight the importance of considering a …