Browsing Material Science & Engineering by Title

Now showing items 1-20 of 56

Al Doped Graphene as A Promising Anode for Sodium Ion Batteries: A Computational Study Thesis

Gemechu Abera; Mulualem Abebe; Sathiesh Kumar (2022-09)

Due to abundance, inexpensive, non-toxicity and the similar chemical property as lithium, sodium ion batteries are the best alternative to lithium-ion batteries. Many research were done to improve the energy density ...
All-Inorganic CsPbBr3 Perovskite Nanocrystals Synthesized with Olive Oil and Oleylamine at Room Temperature Article

Welyab, Getachew; Abebe, Mulualem; Mani, Dhakshnamoorthy; Thankappan, Aparna; Thomas, Sabu; Aga, Fekadu Gochole; Kim, Jung Yong (2023-06-29)

Room temperature (RT) synthesis of the ternary cesium lead bromide CsPbBr3 quantum dots with oleic acid and oleylamine ligands was developed by Zeng and coworkers in 2016. In their works, the supersaturated recrystallization ...
Anisotropy of Microstructure and Its Influence on Thermoelectricity: The Case of Cu2Te−Sb2Te3 Eutectic Article

Mukherjee, Shriparna; Aramanda, Shanmukha Kiran; Legese, Surafel Shiferaw; Riss, Alexander; Olu, Gerda Rogl; Femi, Emmanuel; Bauer, Ernst; Rogl, Peter Franz; Chattopadhyay, Kamanio (2021-10-14)

Using a set of controlled in situ grown lamellar composites of (Cu2Te)62.02−(Sb2Te3)37.98, we report a remarkable variation of transport properties of thermoelectricity not only as a function of microstructural length ...
A Blue-Light-Emitting 3 nm-Sized CsPbBr3 Perovskite Quantum Dot with ZnBr2 Synthesized by Room-Temperature Supersaturated Recrystallization Article

Idosa, Dula Adugna; Abebe, Mulualem; Mani, Dhakshnamoorthy; Thankappan, Aparna; Thomas, Sabu; Aga, Fekadu Gochole; Kim, Jung Yong (2023-07-11)

Recently, tuning the green emission of CsPbBr3 quantum dots (QDs) to blue through quantum size and confinement effects has received considerable attention due to its remarkable photophysical properties. However, the ...
Computational Study of Boron-Doped Monolayer Molybdenum Disulfide as High-Performance Anode Material for Lithium-Ion Batteries Thesis

Abdulbare Kelil; Mulualem Abebe; Solomon Demiss (2023-09)

The energy demand for clean energy storage focuses on electrochemical energy storage devices such as Lithium-ion batteries because of their high capacity, high energy density, long lifetime, user-friendliness, safety, ...
Computational study of the effects of phosphorus doping on structural, electronic, and thermoelectric properties of Mg2Si0.5Sn0.5 alloy Thesis

Denboba, Sultan Mulisa; Abebe, Mulualem; Femi, Olu Emanuel (2022-06-25)

Energy consumption is increasing, necessitating the development of more efficient energy conversion materials. Thermoelectric materials are used to convert waste heat to electricity. Recently, Mg2X (X = Si, Ge, Sn) and ...
Computational study of the effects of silicon doping on structural, electronic and the born effective charge properties of monoclinic HfO2 ferroelectric materia Thesis

Tseganesh Gensa; Mulualem Abebe; Solomon Demiss (2022-11)

In this study, the structural, electronic, and born-effective charge properties of silicon (Si) doped were investigated with respect to density functional theory by using the Quantum Espresso Package. The local density ...
Computational study of the effects of silicon doping on structural, electronic and the born effective charge properties of monoclinic HfO2 ferroelectric material Thesis

Geta, Tseganesh Gensa; Abebe, Mulualem; Demiss, Solomon (2022-11-24)

In this study, the structural, electronic, and born-effective charge properties of silicon (Si) doped were investigated with respect to density functional theory by using the Quantum Espresso Package. The local density ...
Computational study of the effects of Sr-dopant on the lattice thermal conductivity of Mg2Si thermoelectric material Thesis

Degefa, Dita Deme (2021-07-01)

Due to its high abundance, low density, non-toxic nature, and low cost of production, Magnesium Silicide is very important for thermoelectric applications. In recent years enormous investigations have been done to ...
Copper and nickel co-doping effects on the structural, optical and electrical properties of tungsten trioxide nanoparticles prepared by co-precipitation technique Article

Lachore, Wegene Lema; Hone, Fekadu Gashaw; Andoshe, Dinsefa Mensur; Tegegne, Newayemedhin A; Mekonnen, Mulualem Abebe (2022-03-31)

The pristine WO3 (tungsten trioxide) and Cu/Ni Co-doped WO3 nanoparticles were synthesized by the co-precipitation synthesis methods with fixed wt.% of nickel, i.e., 5 wt.%, and different wt.% of copper, i.e., 2, 3, 5 ...
Development Of Ag-Doped (Polyaniline-Benzimidazole And Polyaniline-Polypyrrole/Tio2) Nanocomposite Sensor Materials For The Detection Of E. Coli And Ammonia Other

Tadele Ageru; Delele Worku; Dhakshnamoorthy Mani (2024-03)

Metallic oxide and conducting polymers-basedsensors have been investigated for the detection of endotoxin (E. coli) bacteria in horses’blood and ammonia gas in air and humidity. Due to the capability of CPs’ (like PANI, ...
Effect of A-site off-stoichiometry on the microstructural, structural, and electromechanical properties of lead-free tetragonal 0.80Na0.5Bi0.5TiO3–0.20BaTiO3 (NBT–20BT) piezoceramic Article

Mishra, Anupam; Abebe, Getaw; Jafo, Gudeta; Adhikary, Gobinda Das; De, Arnab (2021-04-20)

A-site off-stoichiometry has been an efficient method to enhance the elec tromechanical properties of lead-free Na0.5Bi0.5TiO3(NBT)-based piezoceramics. In this work, we have reported the effect of Na/Bi off-stoichiometry ...
EFFECT OF MAGNESIUM SUBSTITUTION ON THE STRUCTURAL, OPTICAL AND MAGNETIC PROPERTIES OF NICKEL-ZINC NANOFERRITE PREPARED BY SOL–GEL COMBUSTION METHOD Thesis

TEGEGN, MIHRET (2021-07-02)

Ni0.6Zn0.4-xMgxFe2O4 (x = 0.0, 0.1, 0.15, and 0.2) nanoferrites were successfully synthesized by the sol-gel combustion method. The structural, optical and magnetic properties of these materials were investigated using ...
Effect of Magnetic Field on Photocatalytic Efficiency of Cobalt Ferrite/Graphene Oxide Nanocomposite Thesis

Amsalech Assaro; Solomon Demiss; Olu Emmanue (2023-06)

Nowadays, water pollution by industrial routed toxic dyes become a major concern. Organic dyes, which were found in the wastewater of various industries, have a dangerous and toxic effect on the environment and human ...
Effect of Microwave Irradiation on Structure and Properties of Poly (ethylene terephthalate) (PET) Thesis

Gemechu, Tigist Merga; Hussain, Rabiul (2021-04-02)

The application of microwave energy on polymers has got huge interest in the field of organic chemistry. Industrial use of microwave radiation as an alternative to conventional thermal heating has generated interest ...
Effect of Temperature on Cu (Se, S) for the Degradation of Methylene Blue in Aqueous Solution Thesis

Tereda, Ribka Habteyesus (2021-10-30)

Water pollution is one of the biggest problems in the world nowadays. Among various contaminants at about 20% of the water pollution is caused by organic dyes. Organic dye removal from different sources has never been ...
Effect of Twin-roll Casting Process Parameters on the Thermoelectric Transport Properties of Ag-Bi-Te Alloy Thesis

Tsegaye Markos; Olu Emmanuel; Padaikathan Pambannan (2023-06)

Typical alloy development of a eutectic, compositional system of Ag18.34Bi29Te52.66 (at.%) was successfully obtained by alloying very pure elemental raw materials, viz., Silver, Bismuth, and Tellurium by flame melting. ...
Effects of doping iron on the colouring properties of copper chromate pigment Article

G ETICHA, ZEKARIAS G; ALEX, T C; OLU, FEMI EMMANUEL; YIMAM, ABUBEKER; ALEMAYEHU, ESAYAS (2023-01-13)

Iron-doped copper chromate with (FexCu1–xCr2O4) as a black ceramic decoration pigment is successfully synthesized using a solid-state synthesis method with a pure oxide precursor. The powdered pigment was analysed ...
Effects of firing temperature, and ratio of steel/iron slag on the mechanical and physical properties of clay bricks, the case of Jimma town Thesis

Bane Ibsa; Zekarias Gebreyes (2020-08)

A construction brick made from clay soil and iron slag with variable temperature has been synthesized. In the process iron slag was collected from steely RMI Bishoftu Ethiopia and clay soil was taken from Jimma town ...
Effects of Processing Techniques on Thermoelectric Transport properties of Hypoeutectic and Eutectic alloy of Cu- Bi-Te systems Thesis

Sefu Taye; Olu Emmanuel; P Padiakathan (2023-06)

The effect of different processing techniques on thermoelectric transport properties of Cu3Bi38.2Te58.8 (hypoeutectic compositions) and Cu32Bi20.8Te47.2 (eutectic compositions) systems were investigated. The samples ...

Browsing Material Science & Engineering by Title

Browsing Material Science & Engineering by Title

Search IR

Browse

All of IR

This Collection

My Account