Shamima Choudhury

Shamima Choudhury
University of Dhaka · Department of Physics

About

138
Publications
36,606
Reads
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721
Citations
Citations since 2016
34 Research Items
505 Citations
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
Introduction
Additional affiliations
March 2010 - June 2017
University of Dhaka
Position
  • Managing Director
June 1975 - present
University of Dhaka
Position
  • Professor (Full)
Education
January 1955 - December 1957
Our Lady of Fatima Convent School
Field of study
  • Nursery

Publications

Publications (138)
Article
Plasma polymerized 2-vinylpyridine (PP2VP) thin films have been synthesized under glow discharge using a capacitively coupled system. In the scanning electron microscope images, surface morphology of the PP2VP thin films is observed to be very smooth and crack free. Fourier transform infrared spectra of the thin films clearly indicate that structur...
Article
Performance evaluation was conducted for hyperthermia and positive/negative contrast agents incorporating in-vivo angiography studies in Albino Wister rats using folate-chitosan (FC) coated cobalt ferrite (CF) nanoparticles. The structural characterizations were done using X-ray diffraction (XRD), Fourier transforms infrared (FTIR), Raman and Mössb...
Article
Full-text available
Three sets of starting materials Ca(NO3)2 .4H2O and (NH4)2HPO4; Ca(OH)2 and H3PO4; Ca(OH)2 and H3PO4; (NH4)2HPO4 were chosen for the preparation of different precursors of hydroxyapatite nanoparticles (n‐HAP) by wet chemical precipitation technique denoted by HAP‐1, HAP‐2, HAP‐3. X‐ray Diffraction (XRD) studies show that n‐HAP of all three types ex...
Conference Paper
Full-text available
Cupric oxide (CuO), an environment friendly p-type transition metal oxide was studied in undoped and doped nanostructured forms by researchers for several potential applications such as solar cells, transistors, gas sensors, etc. In this work, manganese (Mn) doped CuO thin films were prepared onto glass substrates at the substrate temperature of 52...
Article
Undoped, Cerium (Ce) doped, Manganese (Mn) doped and Ce-Mn co-doped Barium Titanate (BaTiO 3) with the general formula Ba 1-x Ce x Mn y Ti 1-y O 3 (where x = 0.00, 0.01, 0.02, 0.03, y = 0.00; x = 0.00, y =0.01, 0.02, 0.03; and x = y = 0.01, 0.02,0.03) were synthesized by solid-state reaction method and sintered at 1200 C for 4 hr with an aim to st...
Article
Full-text available
Nanostructured copper oxide (CuO) thin films have been synthesized onto the glass substrates from aqueous solutions of copper (II) acetate monohydrate precursor salt by a cost effective spray pyrolysis technique at various substrate temperatures between 473 and 673 K. The effects of varying substrate temperature on the structure, surface morphology...
Article
Full-text available
Several strategies have been employed to tune the functional properties of environmentally friendly Barium titanate (BaTiO 3). In this work, bismuth (Bi) doped BaTiO 3 with a general formula Ba 1-x Bi 2x/3 TiO 3 (where x = 0.00, 0.01, 0.02, 0.03, 0.04, 0.05 and 0.06) were prepared by the conventional solid-state reaction method. The effect of Bi on...
Article
Full-text available
A series of Co1-xZnxFe2O4 ferrites with x = 0.0, 0.1, 0.2, 0.3, 0.4, 0.5 were synthesized using the standard double sintering ceramic technique. The single-phase cubic spinel structure of the samples was confirmed from the X-ray diffraction patterns and the sharp high intensity peak revealed that the samples are in good crystalline form. The lattic...
Article
Full-text available
Zinc substitution is proposed as an efficient way to improve the performance of the ferrite. In this work, Zinc doped cobalt ferrite with the generic formula CoZnxFe2-xO4, with x = 0.0, 0.1, 0.3 and 0.4 were prepared by conventional ceramic technique, sintered at 1000C for 4 hours in air. The effect of zinc concentration on the initial permeability...
Article
Full-text available
Effect of thickness on structural, optical and morphological properties of 2% copper (Cu) doped zinc selenide (ZnSe) thin films, grown onto chemically and ultrasonically cleaned glass substrate by thermal evaporation method in high vacuum (~10-6 Torr) were studied. Films of 100, 200, 300 and 400 nm thickness were prepared at 200℃ substrate temperat...
Conference Paper
Full-text available
Bangladesh has progressed recently from a low- to a medium-developed country. Women, representing 49.4% of a population totaling 158.5 million, have been marching ahead in many sectors for the last few years. The net enrollment rate of girls in primary education is 98.1%, compared to 95.4% for men, and in secondary education the rate is 63.6% women...
Conference Paper
•Gender inequality is a global problem except few countries like the Philippines, South Africa etc. •Many female scientists find it challenging to return to active research after starting their families. •During this time, opportunities for women scientists to collaborate in scientific research should be made available. •Bangladesh has been attain...
Article
Full-text available
Ba 1−x Ce x Ti 1−y Mn y O 3 (where x and y varies from 0.00 to 0.03) ceramic samples are synthesized by conventional solid state reaction technique. The samples are sintered at 1473 K for 4 h. The grain size is observed to increase with increasing dopant and co-dopant concentration. The X-ray diffraction confirmed the cubic phase of these BaTiO 3 -...
Presentation
Women’s contribution in every sphere is a must to build a developed nation, particularly in the science and technology sector. Utilizing women’s talent in science and technology is crucial for sustainable development. Women are hugely underrepresented in the global technology workforce, not only in developing nations like Bangladesh, but also in...
Article
In this investigation, ceramic pellets having the nominal compositions Bi1-xSmxFe1-yTiyO3 (x, y=0.00, 0.03, 0.06) are synthesized by conventional solid-state reaction method and their consequent ultrafine nanoparticles are fabricated using cost-effective ultrasonication method. Accordingly, a comparative investigation between structural and multife...
Research
BANGLADESH started its journey as the so-called ‘bottomless basket’, in some eyes of the west, and now it has come to a point where the rest of the world has become envious for its remarkable success in improving living standards, adequate food production, primary and girl’s enrolment, infant mortality and birth rate control, and micro-finance, etc...
Article
Full-text available
Cobalt ferrite (CoFe2O4) nanoparticles synthesized by chemical co-precipitation method were studied to see the effect of annealing temperatures on the structural parameters and magnetic properties of the sample. X-ray powder diffraction (XRD), transmission electron microscope (TEM) and SAD pattern demonstrated that single face (fcc) spinel structur...
Research
Full-text available
Structural characterization and magnetic properties of Zn-substituted Li ferrites with composition Zn x Li 0.45−x/2 Fe 2.55−x/2 O 4 (where x = 0.0, 0.1, 0.2, 0.3, 0.4, and 0.5) were studied by varying sintering temperature T S (where T S = 1000, 1050, 1100, 1150, 1200, and 1250 • C) of the six samples. The single-phase cubic spinel structure was fo...
Article
Full-text available
Zinc ferrite samples were prepared by two different routes which are chemical co-precipitation and standard solid state double sintering method. Structural properties of ZnFe2O4 were determined, and initial particle size was found as 5 nm in the samples prepared by chemical co-precipitation technique. The XRD patterns showed the single phase of ZnF...
Article
Full-text available
p>Synthesis and characterization of BiFeO3 samples, co-doped with rare earth Nd and Co in place of Bi and Fe respectively were investigated at room temperature (RT). The formula of the four samples are Co-doped BiFe<sub>1–x</sub>Co<sub>x</sub>O<sub>3</sub> (x = 0.05-0.10) and Nd and Co co-substituted Bi<sub>0.95</sub>Nd<sub>0.05</sub>Fe<sub>0.95</s...
Article
Full-text available
p>To observe the impact of the annealing time on the alloy structure and ultra-soft magnetic properties of Fe<sub>75.5</sub>Si<sub>13.5</sub>Cu<sub>1</sub>Nb<sub>1</sub>B<sub>9</sub>, the alloy was annealed in a controlled way in the temperature range 475 - 600<sup>°</sup>C for different annealing time from 5 to 30 min. Amorphosity of the ribbon an...
Article
Full-text available
p>Effects of indium doping (concentration 0.2, 0.3 and 0.4%) on the optical properties of GaAs thin films were studied. Thin films of 600 nm were grown onto chemically and ultrasonically cleaned glass substrate by thermal evaporation method in high vacuum (~10-4 Pa) at 50°C fixed substrate temperature. The samples were annealed for 15 minutes at a...
Conference Paper
Full-text available
Nanostructured ZnFe2O4 ferrites are prepared using chemical co-precipitation method and their corresponding bulk counterpart are prepared using standard double sintering method. Structural properties are determined from X-ray diffraction line broadening for both nanostructured and bulk (>1000nm) ZnFe2O4. The XRD patterns show single phase of ZnFe2O...
Article
Full-text available
Indium doped Tin oxide (SnO2: In) thin films of various thicknesses (200-600 nm) with fixed 2% indium (In) concentration were prepared by thermal evaporation method onto glass substrates under high vacuum (10-6 Torr). As deposited films were vacuum annealed at 200o C for 60 minutes. The structure, optical, electrical and morphology properties of Sn...
Article
Full-text available
The effect of annealing condition on nanocrystalline amorphous FINEMET type of alloy with nominal composition Fe74Cu1.5Nb2.5Si12B10 prepared by rapid solidification method has been studied to observe the structural properties and crystallization behavior of the material. Nanocrystalline alloy with ferromagnetic bcc nanocrystals with size 15-29 nm e...
Article
Full-text available
p>Pure and magnesium (Mg) doped zinc oxide (ZnO) thin films were prepared onto clean glass substrate by spray pyrolysis (SP) technique at the substrate temperature of 300<sup>°</sup>C. Various optical parameters such as absorption co-efficient, band gap energy, refractive index, extinction coefficient of the thin films were studied using UV-VIS-NIR...
Article
Full-text available
A detailed study of magnetic softness has been performed on FINEMENT type of ribbons by investigating the BH loop with maximum applied field of 960 A/m. The ribbon with the composition of Fe74Cu0.8Nb2.7Si15.5B7 was synthesized by rapid solidification technique and the compositions volume fraction was controlled by changing the annealing condition....
Article
Full-text available
Pure and magnesium (Mg) doped zinc oxide (ZnO) thin films were prepared onto clean glass substrate by spray pyrolysis (SP) technique at the substrate temperature of 300°C. Various optical parameters such as absorption co-efficient, band gap energy, refractive index, extinction co-efficient of the thin films were studied using UV-VIS-NIR spectrophot...
Conference Paper
Full-text available
Nanostructured ZnFe2O4 ferrites are prepared using chemical co-precipitation method and their corresponding bulk counterpart are prepared using standard double sintering method. Structural properties are determined from x-ray diffraction line broadening for both nanostructured and bulk (>1000nm) ZnFe2O4. The XRD patterns show single phase of ZnFe2O...
Conference Paper
Full-text available
Structural properties of Zn-Li ferrites with the composition ZnxLi0.45-x/2Fe2.55-x/2O4 (where, x=0.0, 0.1, 0.2, 0.3, 0.4 and 0.5) synthesized by conventional ceramic method have been investigated as a function of Zn content and sintering temperature TS (where TS=1000, 1050, 1100, 1150, 1200 and 1250oC). The X-ray diffraction (XRD) analysis confir...
Article
Full-text available
Polycrystalline NiFe2O4 samples were prepared from analytical grade powder of NiO and Fe2O3 by conventional double sintering technique. The samples were sintered at 1000 - 1400°C. The scanning electron micrographs (magnification ´ 10000) of the samples revealed that the grain size increases and the porosity decreases with the increase in sintering...
Conference Paper
Full-text available
The nominal compositions of Bi 1-y Nd y Fe 1–x Co x O 3 (i. y=0, x=0.05 ; ii. y=0, x=0.10 ; iii. y=0.05, x=0.05 ; iv. y = 0.10, x = 0.10) ceramics were synthesized by conventional solid state reaction technique and their dielectric and magnetic properties were investigated at room temperature. The X-ray diffraction patterns clearly indicate that th...
Article
Full-text available
Electrical, optical and structural properties of p-type single crystal silicon were investigated in this work. Electrical conductivity of p-type silicon was measured in the temperature ranges 190-300 K. The acceptor ionization energy ((E A) was between 0.047-0.051 eV. Photoconductivity of the material was investigated by varying sample current, lig...
Article
Full-text available
abstract Biomedical applications of ZnFe2O4 nanoparticle are preferable among all kinds of ferrites due to the compatibility of Zn2 þ ions for human bodies. We have followed the soft chemical route to synthesize chitosan and PEG coated ZnFe2O4 nanoparticles and also the chitosan-coated-nanoparticles encapsulated with liposome. X-ray diffraction stu...
Article
Full-text available
The effects of Li 2 O additives on the structural, magnetic and electrical properties of Ni 0.5 Mg 0.5 Fe 2 O 4 , prepared by conventional double sintering ceramic technique were investigated. The X-ray diffraction (XRD) pattern of the prepared samples showed single phase cubic spinel structure. Variation of lattice parameter has been observed with...
Article
Full-text available
Optical and structural characterization of Zinc Selenide (ZnSe) thin films (thickness ranging between 200 - 500 nm) prepared by vacuum (~10-6 Torr) evaporation method were investigated. The thin films were deposited with varying substrate temperature in the range 373 - 573K. Optical measurements were carried out with UV-VIS-NIR spectrophotometer wi...
Conference Paper
Full-text available
Electrical, optical and structural properties of p-type single crystal Silicon were investigated. Electrical conductivity was measured in the temperature ranges 196K-299K. The acceptor ionization energy (ΔE‪ A) obtained from the graphs was 0.051 eV. Photoconductivity of the same samples was also investigated under different conditions (varying samp...
Article
Full-text available
Nanocrystalline amorphous FINEMET alloy with a nominal composition Fe74Cu1.5Nb2.5Si12B10 prepared by a rapid solidification method was annealed in a controlled way in the temperature range 475–650 °C for 15 minutes in order to study the structural parameters such as grain size, Si content and lattice parameter of the nanocrystalline Fe(Si) nanograi...
Article
Full-text available
Substrate temperature dependent optical and structural properties of Cadmium Telluride (CdTe) thin films were studied. Films were grown onto glass substrate by thermal evaporation method in high vacuum (10^-6 Torr) with varying thickness (200 ~ 500 nm). All the films were characterized optically by UV-VIS-NIR spectrophotometer in photon wavelength...
Article
Full-text available
The electrical transport properties of ZnxLi0. 45-x/2Fe2. 55-x/2O4 (where, x= 0.0, 0.3, 0.5) synthesized by conventional ceramic method have been investigated as a function of Zn content. The X-ray analysis confirms the formation of single phase cubic spinel structure. The ac resistivity and dielectric constant show opposite trend with increase...
Conference Paper
Women succeed in science as a result of their own merit, initiative and drive. Family support, institutional support and most importantly government support are very important for women to succeed in their professional career. At present success remains an exception, not the rule as the women have to face challenges at all levels of ladder in their...
Article
Full-text available
A series of Cu1-x Znx Fe2O4 ferrite (with x = 0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6) compositions were synthesized using the standard solid-state reaction technique. X-ray diffraction was used to study the structure of the above investigated samples. The theoretical and experimental lattice parameters (a th and a exp) were calculated for each compositi...
Article
Full-text available
Effect of thickness on the optical and electrical properties of gallium arsenide (GaAs) thin films were studied. The films of different thicknesses were prepared by vacuum evaporation method (~10^-4 Pa) on glass substrates at a substrate temperature of 323 K. The film thickness was measured in situ by a frequency shift of quartz crystal. The thickn...