http://dspace.aiub.edu:8080/jspui/handle/123456789/103 <P> Provide information on conference articles here </P> tags 2026-04-01T18:59:57Z http://dspace.aiub.edu:8080/jspui/handle/123456789/2560 Title: Dynamics of electron density, and dielectric properties of CoFe2O4 nanoparticles influenced by substitution of La3+ at Fe3+ Authors: Sabuj, Md. Abdul Malek; Mondol, Frank Heaven; Hossain, Syed Sabit; Ferdous, Humayra; Hossain, Md. Sarowar Abstract: Cobalt ferrite (CoFe2O4) has been subjected to the existence or nonexistence of ferroelectric properties. The nominal composition of CoLaxFe2-xO4 (where, x = 0, 0.05, 0.10, 0.15, 0.20, 0.25, and 0.30) has been synthesized by the sol-gel method. The synthesized grain sizes varied from 60 nm to 80 nm. The electron density plots obtained using Rietveld refinement of the x-ray diffraction data showed the displacement of the Co and Fe ions which is highly influenced by the substitution of La3+ at Fe3+. It is also observed that the AC conductivity increases with the increase of La3+ amount in the parent sample (CoFe2O4) which is dominated by frequency. The contribution of grain and grain boundaries on dielectric relaxation has been investigated at room temperature (25℃). The electric permittivity (ε) is also enhanced due to the substitution La3+ at Fe3+. Finally, the composition CoLa0.10Fe1.9O4 sintered at 900oC shows the highest electric permittivity (ε^' ) with low dielectric loss (tanδ) and finds a suitable application for the strain gauge, made by evaporating a small amount of metal onto the surface of a thin sheet of this material. 2024-05-09T00:00:00Z http://dspace.aiub.edu:8080/jspui/handle/123456789/2559 Title: Development of a simulated blood-like solution for medical experiments Authors: Md Abdullah, Shamvi; Fahim, Md. Ashifur Rashid; Mithe, Maliha Mostakim; Ferdous, Humayra; Hossain, Md. Sarowar Abstract: To some extent medical experiments must be done in blood, to check the efficacy of some medicines, culturing or finding progress of pathogenic infection, etc. However, to carry out this in a real blood sample, there are a lot of difficulties in getting, storing, or handling it. Even, the intended lab may not have a license to handle it, the short life span of the blood sample before it gets rotten, quick coagulation preventing experiments for longer times, etc. In this work, we present the development of a blood-mimicking medium that retains the main physical and biological characteristics of real blood, without the accompanying inconveniences. It has a blood red color that can be adjusted to represent both oxygen-rich (like arterial) and oxygen-deprived (like venous) blood. This solution has a color absorption similar to real blood. In addition, the synthesized liquid does not give any precipitate and does not discolor or denature on exposure to normal ambiance (air/oxygen/light). This prepared solution can now be used as a medium for doing suitable experiments like culturing bacterial cells and treatment with various drugs on these, checking the effect of blood cells on oxygen variation or temperature effect, or even be used as a demonstration medium for blood flow in arteries or veins in animal (including human) body. 2024-05-09T00:00:00Z http://dspace.aiub.edu:8080/jspui/handle/123456789/2557 Title: Enhancement of elastic property in a CoNiAl ferromagnetic shape memory alloy and it’s magnetic, electronic and lattice contribution Authors: Hossain, Md. Sarowar; Haque, Md. Ehasanul Abstract: In this investigation, two alloys of nominal compositions Co42Ni31Al27 and Co40Ni32Al27 have been synthesized. Their structure and microstructural properties confirmed the growth of non-ferromagnetic shape memory alloys of face-centered cubic γ phase as an inter-grain of the body-centered cubic β phase. Due to the replacement of ~2% Co by Ni in the studied Co-Ni-Al system, the amount of γ phase is increased by 1.5 times. Moreover, martensitic transition temperatures shifted to the higher side and the enthalpy during this martensitic transition dropped from 1.74 J/g to 0.25 J/g. Finally, temperature-dependent dynamic elastic properties have confirmed the existence of elastic recovery in both samples, in between the temperatures from 120 K to 300 K, however, the lattice contribution and electronic contribution are much higher in the Co40Ni32Al27 sample. Due to the nominal decrement of Co, the alloy system Co40Ni32Al27 demonstrated improved physical properties which might be promising for functional applications. 2024-05-09T00:00:00Z http://dspace.aiub.edu:8080/jspui/handle/123456789/1867 Title: Synthesis and characterization of PVDF-BiFeO3 nanocomposite films Authors: Rana, Dhiraj Kumar; Kundu, Shovan Kumar; Raja, Nitish; Mukherjee, Ayan; Basu, Soumen 2016-01-01T00:00:00Z