Dissertations/Theses - Department of Physics: Recent submissions

Now showing items 81-100 of 391

Plant extract mediate synthesis of magnetite (fe3o4) nanoparticles and its antibacterial application

Moniruz Zaman, Mohammad (Department of Physics, BUET, 2018-09-04)

Magnetite (Fe3O4) nanoparticles (NPs) were prepared through green synthesis route using Ipomoea aquatica leaf extract that acted as an efficient stabilizer and capping agent of the NPs. These NPs has potential applications ...
Synthesis and charcterization of structural, magnetic and optical properties of Dy2B′CrO6 (B′ = Fe, Ni) perovskites

Rana Hossain, Md. (Department of Physics, BUET, 2018-09-01)

In this investigation, structural, magnetic, and optical properties of polycrystalline double perovskites Dy2FeCrO6 (DFCO) and Dy2NiCrO6 (DNCO) have been investigated. Both materials have been synthesized by sol‒gel reaction ...
Study of mechanical, electrical and thermal properties of carbon nanotube incorporated cellulose nanocomposites

Urena Mostafa (Department of Physics, BUET, 2018-05-27)

Low cost, biodegradable, thin and flexible carbon nanotube (CNT)/cellulose nanocomposites have been prepared by varying the concentration of multi-walled carbon nanotubes (MWCNTs) up to 3.0 wt%. To attain effective ...
Synthesis and characterization of possible sustainable relaxor material Cax(Li0.5Bi0.5)1-x(Fe0.5Nb0.5)O3

Mamun-Ar Rashid, Md. (Department of Physics, BUET, 2017-09-16)

The role of Calcium (Ca) doping with Lithium (Li) in Bismuth (Bi)-site and Niobium (Nb) in Ferrite (Fe)-site on the electrical and magnetic properties of BiFeO3 ceramic has been investigated in this research. The ...
Structural, electrical and optical properties of diethanolamine thin films synthesized by plasma polymerization technique

Nasima Banu (Department of Physics, BUET, 2018-06-24)

The materials formed using plasma polymerization method are vastly different from conventional polymers and constitute a new kind of material. Diethanolamine, an organic compound has been chosen to deposit plasma polymerized ...
Estimation of radiation dose and associated cancer risks from computed tomographic scans

Shaiful Kabir (Department of Physics , BUET, 2018-03-31)

Absorbed dose of 100 patients during CT imaging procedure in a renowned hospital of Dhaka city were measured using Thermoluminescence (TL) chips. For dose measurement at the scanned region TL chips were sealed in a uniform ...
Analysis of grain growth, densification and functional properties of manganese substituted NiCuZn nanocrystalline ferrites

Abdul Ahad (Department of Physics , BUET, 2017-08)

Ni0.50-xMnxCu0.15Zn0.35Fe2O4 (with x values ranging from 0.00 to 0.25 in steps of 0.05) were synthesized by the sol-gel auto combustion method. Pellet and toroid shaped samples prepared from each compositions are sintered ...
Investigation of structural, photocatalytic and magnetic properties of dy doped cofe2o4 nanoparticles prepared by hydrothermal method

Kowser Pervin (Department of Physics , BUET, 2018-03-07)

Magnetic nanoparticles of undoped CoFe2O4 and 10% Dy doped CoFe2O4 (nominal composition of CoFe1.8Dy0.2O4) were successfully prepared by using hydrothermal synthesis technique at 200oC reaction temperature. Further, heat ...
Electrical and optical characterization of plasma polymerized n-butyl methacrylate thin films deposited on glass substrate

Rahima Nasrin (Department of Physics , BUET, 2018-03-21)

Plasma polymerized n-butyl mehacrylate (PPnBMA) thin films of varying thicknesses were prepared at an optimized condition at room temperature by an AC plasma polymerization (PP) system using a capacitively coupled parallel ...
Effect of fiber-surface modifications onto material properties of sponge-gourd fiber reinforced polylactic acid bio-composites

Taimur-Al-Mobarak (Department of Physics , BUET, 2018-03-13)

This research work has been undertaken to fabricate environmentally friendly biocomposites for biomedical and household applications. Sponge-gourd natural fibers (SGF) obtained from Luffa cylindrica plant were separately ...
Study of mesoscale convective systems for curving cyclone madi and non-curving cyclone phailin using WRF model

Rajib Rari, Md. (Department of Physics , BUET, 2018-06-09)

The formation and intensity of tropical cyclone (TC) over the Ocean not only depends on proper synoptic-scale atmosphere but also on active Mesoscale Convective Systems (MCSs). In this study, cyclone Phailin and Madi are ...
Study of the optical properties and DC electrical carrier transport on thin films of plasma polymerized methyl acrylate

Nath, Sumon Deb (Department of Physics , BUET, 2017-12)

Plasma polymerization is a distinctive technique for direct polymeric thin films deposition from different organic monomers. The organic compound methyl acrylate (MA) has been chosen as monomer to deposit plasma polymerized ...
Investigation of structural, mechanical, and electrical properties of carbon nanotube reinforced rubber nanocomposites

Forhad Hossain, Md. (Department of Physics , BUET, 2017-09)

Natural rubber (NR) is an interesting biopolymer. But the modulus and durability of a neat rubber is very low and therefore, addition of reinforcing agents is essential to improve different properties of NR for its specific ...
The role of rare earth and transition metal cations doping on the structural and functional properties of Bi1-xYxFe0.7Mn0.3o3 magnetoelectric ceramics

Saha , Sonet Kumar (Department of Physics, BUET, 2017-07-26)

In this research, Bi1-xYxFe0.7Mn0.3O3 (x=0.00, 0.05, 0.10, 0.15 and 0.20) ceramics have been prepared by conventional solid state reaction method and sintered at 800, 825 and 875 oC. The prepared samples were characterized ...
Study of the structural, optical and electrical properties of indium doped zinc oxide thin films synthesized by spray pyrolysis technique

Sabrina Sharmin (Department of Physics, BUET, 2017-03-22)

ZnO and ZnO:In thin films with 0.6 at % to 1.4 at % In doping (with an interval of 0.2 at %) are synthesized on to glass substrate by spray pyrolysis technique (SPT) at two substrate temperatures of 400 °C and 450 °C. The ...
Investigations of the ac electrical properties of the thin films of 2-furaldehyde synthesized by plasma polymerization technique

Kishwar- E Hasin (Department of Physics, BUET, 2017-07-29)

Plasma polymerized 2-Furaldehyde (PPFDH) thin films of different thicknesses were synthesized onto glass substrates by using a capacitively coupled plasma polymerization reactor at line frequency. The thicknesses of the ...
Study on recurving of tropical cyclones in the Bay of Bengal during 1991-2015

Shamima, Yasmin Hima (Department of Physics, BUET, 2017-08-21)

Tropical cyclone (TC) is a very intense low-pressure system formed over tropical oceans, and its translational motion is largely modulated by large-scale wind flow. Due to the position in the tropical region and the funnel ...
Study on spatio-temporal variability of dust aerosol and its impact on atmospheric variables in and around Bangladesh

Banik, Diba (Department of Physics, BUET, 2017-08-26)

Acknowledgment All praises are due to the Almighty God who has enabled me to complete this thesis for the M.Sc degree. I would like to express my gratitude and appreciation to my supervisor Dr. Nasreen Akter, ...
Study on the effect of the Fe doping on SnO2 nanoparticles prepared by spray pyrolysis technique for gas sensing applications

Babu, Md. Majibul Haque (Department of Physics, 2017-05-24)

Tin Oxide (SnO2) and Fe-doped SnO2 (SnO2:Fe) thin films have been synthesized by Spray Pyrolysis Technique (SPT) on plane glass substrates. SnO2 is doped with Fe in four different concentrations (2.0, 4.0, 6.0 and 8.0 ...
Study of diurnal variation of rainfall in Bangladesh using GSMaP data

Hossain, Jahid (Department of Physics (PHY), 2017-06-03)

To study the diurnal variation of rainfall and possibility to use of Global Satellite Mapping of Precipitation (GSMaP) data in Bangladesh, GSMaP hourly data of spatial resolution of 0.1 degree by 0.1 degree and three hourly ...

Now showing items 81-100 of 391

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