Subrata Das

B.Sc. in Electrical and Electronic Engineering, BUET, CGPA: 3.95 out of 4.00

 

 

 

 

 

 

About Me: I am highly motivated to build up my career as a researcher. With a view to achieving my goal, currently I am working on different research projects. I believe this to be a great opportunity to attain invaluable experience and practical knowledge in the research field which will immensely help my growth as a research scholar.

Research Interest: Nanotechnology, Energy Harvesting and Conversion, Magnetic materials

Research Projects:

So far, I have contributed to the following research projects.

1.   Synthesis of MoS2 incorporated GaFeO3 nanocomposites and investigation of their structural and magnetoresistive properties along with photocatalytic dye degradation and hydrogen production ability

Summary:  In this research project, multiferroic GaFeO3 nanoparticles will be synthesized using sol-gel method and their structural and magnetoresistive properties will be thoroughly investigated. It is also intended to incorporate MoS2 with synthesized GaFeO3 nanoparticles using hydrothermal technique to investigate the optical properties as well as photocatalytic dye degradation and solar hydrogen production rate of the as-prepared GaFeO3-MoS2 nanocomposites.

2. Synthesis and characterization of MoS2 based nanocomposites for solar energy applications 

Summary:  In this research project, MoSincorporated α-Fe2O3/ZnO nanocomposite has been synthesized adapting facile low temperature hydrothermal technique. The prepared nanocomposite with excellent structural, morphological and photocatalytic properties has demonstrated great performance in dye degradation and photocatalytic hydrogen production via water splitting.

3. Synthesis of doped double-layered perovskite manganites at inert atmosphere and investigation of their structural, morphological and magnetic properties

Summary: In this project, Gd doped double-layered perovskite manganites La1.7Gd0.3SrMn2O7 and La1.4Gd0.6SrMn2O7 have been synthesized at inert atmosphere and further, their structural and magnetic characterizations have been performed. The as-synthesized dilute amount of Gd doped La1.7Gd0.3SrMn2O7 manganite with enhanced ferromagnetic softness may have potential applications in numerous fields.

4. Feasibility studies on deploying a self-contained solar-hydraulic pilot power plant in a rural area in Bangladesh 

Summary: This project has been funded by the Global Challenges Research Fund (GCRF) and conducted by the University of Glasgow, UK in collaboration with Bangladesh University of Engineering and Technology (BUET). In this pilot project, feasibility studies have been performed for establishing a novel hybrid power plant in hilly regions of Bangladesh with a view to utilizing three renewable energy resources i.e. hydroelectricity, solar and wind energy simultaneously.

 

Publications:

Peer-reviewed Journals:

 1. MoS2 nanosheets incorporated α-Fe2O3/ZnO nanocomposite with enhanced photocatalytic dye degradation and hydrogen production ability 

Angkita Mistry Tama*, Subrata Das*, Sagar Dutta, M D I Bhuyan, M. N. Islam and M. A. Basith,  RSC Advances , 9, 40357–40367, 2019.           * Equal contribution

2. Facile synthesis of MoS2 nanosheets with enhanced photocatalytic performance using ultrasound driven exfoliation technique 

   Subrata Das , Angkita Mistry Tama, Sagar Dutta, Md. Shahjahan Ali and M A Basith, Materials Research Express, 6, 125079, 2019.

 3. Enhanced magnetic softness of double-layered perovskite manganite La1.7Gd0.3SrMn2O7 

Subrata Das, Irin Sultana, M. D. I. Bhuyan and M. A. Basith, IEEE Magnetics Letters, 10 (1), 2503704, 2019

 

Conference proceedings/ Presentation:

1. Temperature dependent magnetic properties of Nd0.7Sr0.3MnO3 nanoparticles

Subrata Das and M. A. Basith, International Conference on Physics-2020, Atomic Energy Centre, Dhaka, Bangladesh, 05-07 March 2020. 

2. Nanostructured GaFeO3: A Promising Photon Trapping Multiferroic Material for Efficient
Electron-Hole Separation

Subrata Das and M. A. Basith, accepted in the 3rd IEEE International Conference on Telecommunications and Photonics (ICTP), Dhaka, Bangladesh, 28-30 December 2019.

3. Deep learning-based eye gaze controlled robotic car
 
D. Saha, M. Ferdoushi, M. T. Emrose, Subrata Das, S. M. M. Hasan, A. I. Khan, C. Shahnaz, IEEE Region 10 Humanitarian Technology Conference, Sri Lanka, 2018.

 

Awards/ Recognition:

  1. Best Poster Presentation Award in the International Conference on Physics-2020, organized by Bangladesh Physical Society, held at Atomic Energy Centre, Dhaka during 05-07 March, 2020.
  2. University Merit Scholarship, awarded by BUET.
  3. Dean’s List Scholarship, awarded by BUET.

 

 

 

 

 

 

 

 

 

 

 

Md. Sarowar Hossain

sakil_phy@yahoo.com

PhD in Physics (Experimental)
TWAS-Bose Postgraduate award, ICTP, Italy
Calcutta University (Research was done at S N Bose National Centre for Basic Sciences), Calcutta, India.

M.S in physics (with thesis)
ShahJalal University of Science and Technology (SUST), CGPA: 3.90 out of 4.00.

 

Researcher Data:
Researcher ID: AAY-4806-2020; h-Index: 5; Citation: 148
ORCID ID: http://orcid.org/0000-0001-6880-7212
Scopus ID: 57210701402
Google Scholar: h-Index: 5, i10-Index: 5, Citation: 181
Research Gate: RG Score: 13.45, Citation: 116
Mendeley: h-index: 4, Citation: 151
(Updated on 06/11/2020)

About me: I would like to develop professional skills in the education sector as teaching students of every age by providing work-based learning. In the field of research I have great interest to build career with good scientific profile, collaborations, publications etc.

Research Interest: Ferromagnetic Shape Memory Alloys, Sound Velocity and Internal Friction, Dynamic elastic properties, Nanotechnology, Thinfilm, Multiferroic, Dielectric Material, Nanopowder, Metallic Ribbon, Rheological Fluid.

 

Research Projects/Thesis:
So far, I have contributed to the following research works.

  1. Sound Velocity and Internal Friction in Disordered Magnetic Alloys.

Summary:

In this research work we focused on the dynamic elastic behavior of Ferromagnetic shape memory alloys (FSMAs) and Fe based metglass (FINEMET®) alloy systems. The relative change in sound velocity  and internal friction  measurements are main tools to explain elastic nature. The metallic alloys have been prepared in both the ribbon and reed form by arc melting and melt spinning technique. The primary aspect of this thesis is to explore structural enhancement in magnetic alloys and the magnetoelastic effects on transport properties in disordered alloys. Due to brittleness of most of the FSMAs CoNiAl was proposed as an alternative. The interplay and alteration of  and  phases of microstructure enhance the mechanical strength of this alloy. Exploring to low temperature analysis of resistivity  data, a spin-glass like phase is found below 25K in Co39Ni34Al27 annealed at 1373K/24h and post-annealed at 1473K/72h for the first time.

The other disordered alloy named FINEMET metglass with a nominal composition Fe76.5Cu1Si13.5B9 were prepared. The thermo-resistivity at low temperature confirms to be entirely metallic during and heating cycle. The only thermal hysteresis found in thermo-elastic nature confirms the phase transition was magnetic in origin. The changes in elastic properties like severely affected electronic part and phononic part in magnetic field of 300 Oe is the evidence of existing strong magnetoelastic coupling in these materials. In parallel, increase in attenuation must be coming from amorphousness of the metglass in low temperature, wherein the fine particles were presumably offering more scattering to the phonons.

  1. Structural and dielectric properties of doped and undoped Barium Titanate (BaTiO3).

Summary:

In this research work, the experimental investigation of structural and dielectric properties of BaTiO3 ceramic doped with MoO3, SnO2 and WO3 has been carried out. The samples were prepared by double sintering ceramic technique using barium carbonate (BaCO3), titanium dioxide (TiO2), and with MoO3, SnO2 and WO3 as dopants. The density, ac resistivity, dielectric constant and loss tangent were measured. XRD was used to observe different phases which ensure that tetragonal structure become stable in all the samples except BaTi0.85Sn0.15O3. The optimum condition for preparation of the samples in respect of sintering temperature and calcinations time has been determined. The disc shaped samples were prepared to investigate dielectric properties and the phase transition temperature.

  1. Pulse echo technique to measure the correlation between attenuation coefficient and viscosity.

Summary:

In this project work an ultrasonic Pulse-Echo Immersion Technique was developed by using a piezoelectric transducer of 1MHz that introduces mechanical pulses into the material. These pulses are received back into the transducer after they have travelled through the material and changes in those pulses can be analyzed to calculate the attenuation coefficient, sound velocity, adiabatic compressibility and bulk modulus. The investigation was done to make a correlation between attenuation coefficient and viscosity of some Newtonian and Non-newtonian fluids.

  1. Study of the internal structure and characteristics of 555 timer IC with different modes of operations.

Summary:

In this research project we have studied the internal structure of an industry standard monolithic 555-timer circuit designed and fabricated in the in-house silicon carbide (SiC) low-voltage bipolar technology. This work demonstrates the 555-timer integrated circuits (ICs) characterization in both astable and monostable modes of operation, with a supply voltage of 15 V. By controlling the pin configuration, resistors and capacitors we successfully observed the different modes of operation of that timer IC.

 

Journal Publications:

  1. Effect of annealing on the structural and magnetic properties of CoNiAl FSMA.
    Md Sarowar Hossain, Tanmoy Ghosh, B. Rajini Kanth, and P.K. Mukhopadhyay; Cryst. Res. Technol. 1800153, 1-6 (2019).
  1. Correlation of dynamic elastic properties of a heat treated CoNiAl alloy system with its microstructural changes.
    Md. Sarowar Hossain, Gokul P, Barnana Pal and P K Mukhopadhyay, Shap. Mem. Superelasticity, 5, 468–475 (2019).
  1. Effect of Annealing on Elastic Moduli of a FSMA
    Md Sarowar Hossain, B. Rajini Kanth and P. K. Mukhopadhyay, Shap. Mem. Superelasticity, 3, 199-205 (2017)
  1. Interesting low temperature magneto-elastic behavior of a FINEMET metglass
    Md. Sarowar Hossain, M. A. Hakim and P. K. Mukhopadhyay; AIP Advances., 7, 115221 (2017)
  1. Ultrasonic Characterization of Newtonian and Non-newtonian Fluids
    Md Sarowar Hossain, Barnana Pal and P. K. Mukhopadhyay; Universal Journal of Physics and Application. 12(3), 41-46 (2018)
  1. Low temperature Elastic Properties of FINEMET melt spun ribbon
    Md. Sarowar Hossain, B. Rajini Kanth, M.A. Hakim and P.K. Mukhopadhyay, International E – Publication, ISBN: 978-93-84659-00-4, 2015
  1. Microstructural evolution and its outcome on the photo induced micro actuation effect and mechanical properties of copper doped Co-Ni-Al FSMA
    Abhishek Bagchi, Suman Sarka, Sandip Bysakh, Chandra Sekhar Tiwary, Md Sarowar Hossain, Susenjit Sarkar, P.K. Mukhopadhyay, Journal of Alloys and Compounds 846, 156432 (2020)
  1. Size dependent magnetic and electrical properties of Ba-doped nanocrystalline BiFeO3
    Mehedi Hasan, M. A. Hakim, M. A. Basith, Md. Sarowar Hossain, Bashir Ahmmad, M. A. Zubair, A. Hussain, and Md. Fakhrul Islam; AIP Advances, 6, 035314 (2016)
  1. Saturation magnetization and band gap tuning in BiFeO3 nanoparticles via co-substitution of Gd and Mn
    Mehedi Hasan, M.A. Basith, M.A. Zubair, Md. Sarowar Hossain, Rubayyat Mahbub, M.A. Hakim, Md. Fakhrul Islam, J. Alloys. Compds., 687, 701-706 (2016)
  1. A soft chemical route to the synthesis of BiFeO3 nanoparticles with enhanced magnetization
    Mehedi Hasan, Md. Fakhrul Islam, Rubayyat Mahbub, Md. Sarowar Hossain, M.A. Hakim, Materials Research Bulletin, 73, 179–186 (2016)
  1. Preparation of high crystalline nanoparticles of rare-earth based complex pervoskites and comparison of their structural and magnetic properties with bulk counterpart
    A. Basith, M. A. Islam, Bashir Ahmmad, Md. Sarowar Hossain and K Mølhave, Mater. Res. Express, 4, 075012 (2017)
  2. Effect of CePO4 on structural, magnetic and optical properties of ceria nanoparticles
    Md Abdullah Al Mamun, Manifa Noor, A K M Atique Ullah, Md. Sarowar Hossain, Matin Abdul, Fakhrul Islam and M A Hakim, Mater. Res. Express, 6, 016102, (2019)
  1. The 10% Gd and Ti co-doped BiFeO3: A promising multiferroic material
    A. Basith, Areef Billah, M. A. Jalil, Nilufar Yesmin, Mashnoon Alam Sakib, Emran Khan Ashik, S.M.Enamul Hoque Yousuf, Sayeed Shafayet Chowdhury, Md. Sarowar Hossain, Shakhawat H. Firoz, Bashir Ahmmad, J. Alloys. Compds., 694, 792-799 (2017)
  2. Elastic Property Study on CoNiAl Ferromagnetic Shapememory Alloy in the Vicinity of Martensitic Transformation Temperature Using Vibrating Reed Method
    Rajini Kanth, Md. Sarowar Hossain and P. K. Mukhopadhyay, International E – Publication, ISBN: 978-93-84659-00-4, 2015
  3. Development of Pulse-echo Technique to Measure the Ultrasonic Properties
    Dipanjan Samanta, Md. Sarowar Hossain , Barnana Pal and P. K. Mukhopadhyay, International E – Publication, ISBN: 978-93-84659-00-4, 2015

 

Conference Presentation:

  1. Structural and dielectric properties of doped and undoped Barium titanate (BaTiO3)
    Md. Sarowar Hossain,  M. A. Hakim, M. H. Ahsan, International Conference on Physics of Today, BUET, Dhaka, Bangladesh, 15-16 March, 2012.
  1. Effect of annealing on elastic moduli for a FSMA
    Md Sarowar Hossain, B. Rajini Kanth and P. K. Mukhopadhyay; International Conference on Ferromagnetic Shape Memory Alloys (ICFSMA), Sendai, Japan, 5-7 September, 2016.
  1. Effect of composition on elastic moduli for a CoNiAl system
    Rajini Kanth, Md Sarowar Hossain and P. K. Mukhopadhyay; International Conference on Ferromagnetic Shape Memory Alloys (ICFSMA), Sendai, Japan, 5-7 September, 2016.
  2. Effect of annealing on elastic moduli for different compositions of CoNiAl FSMAs
    Md Sarowar Hossain, B. Rajini Kanth and P. K. Mukhopadhyay, Bose Fest 2016, S N Bose National Centre For Basic Sciences, Saltlake, Kolkata, West Bengal, India.5.
  1. Incidence of Ultrasonic wave through Newtonian and NonNewtonian fluids
    Md Sarowar Hossain, Animesh Basak, Barnana Pal and P.K. Mukhopadhyay, XXIst National Symposium on Ultrasonics (NSU-2016), S N Bose National Centre for Basic Sciences, Saltlake, Kolkata, India, 08-10 November, 2016.
  1. Effect of grain growth inhibitor in magnetoelastic behaviour of FINEMET melt spun ribbons
    Recent Trends in Condensed Matter Physics (RTCMP), Bose Institute, Kolkata, India, 31st October to 3rd November, 2017
  1. Elastic Moduli Of Ni-Fe-Al Ferromagnetic Shape Memory Alloy Studied By Resonant Ultrasound Spectroscopy
    Md. Sarowar Hossain, Ankit Kargeti, S. Vinodh Kumar, Barnana Pal and P. K. Mukhopadhyay, XXII National Symposium (NSU-2017) on Advances in Ultrasonics and Materials Research, Central University of Himachal Pradesh, Dharamshala, India, November 8-10, 2017.
  1. Multiferroic properties of Gd Doped BiFeO3 Nanoparticles Prepared By Sol-Gel Method.
    R. Azad, Areef Billah, Md. Sarowar Hossain, Bashir Ahmmad, M. A. Basith, National Conference on Physics-2017, Atomic Energy Centre, Dhaka, Bangladesh, 05-07 January, 2017
  2. Rietveld Analysis and Magnetic Properties of Nd0.7Sr0.3MNO3 Manganites.
    Rana Hossain, M. A. Islam, Md. Sarowar Hossain, Tapas Paramanik, M. A. Basith, National Conference on Physics-2017, Atomic Energy Centre, Dhaka, Bangladesh, 05-07 January, 2017.
  1. Effect of annealing on the structural transformations and magnetic properties of CoNiAl FSMA
    Md Sarowar Hossain, Tanmoy Ghosh, B. Rajini Kanth and P.K. Mukhopadhyay; International Conference on Magnetic Materials and Applications (ICMAGMA), Hyderabad, India, 2017
  1. Magnetic field induced Elastic behaviour of FINEMET Melt spun ribbon
    Md. Sarowar Hossain, M.A. Hakim and P.K. Mukhopadhyay; International Conference on Magnetic Materials and Applications (ICMAGMA), Hyderabad, India, 2017
  1. Stress induced Martensitic transformation in a CoNiAl Ferromagnetic Shape Memory Alloys using Vibrating Reed Apparatus
    Rajini Kanth, Md Sarowar Hossain and P.K. Mukhopadhyay; International Conference on Magnetic Materials and Applications (ICMAGMA), Hyderabad, India, 2017
  2. Structural anomaly and shape memory effect in a CoNiAl FSMA system due to heat treatment
    Kartik Panda, Md Sarowar Hossain and P K Mukhopadhyay; International Conference on Magnetic Materials and Applications (ICMAGMA), Hyderabad, India, 2017
  1. Effect of annealing on the structural transformations and magnetic properties of a CoNiAl FSMA
    Md Sarowar Hossain, and P.K. Mukhopadhyay, Bose Fest 2017, S N Bose National Centre For Basic Sciences, Saltlake, Kolkata, West Bengal, India.
  1. Magneto elastic behavior in Co-Ni-Al FSMA
    Md. Sarowar Hossain, P. K. Mukhopadhyay, Bose Fest 2018, S N Bose National Centre For Basic Sciences, Saltlake, Kolkata, India.
  1. Stress induced dynamic elastic properties in CoNiAl Ferromagnetic Shape Memory Alloy
    Md Sarowar Hossain, S. Vinodh Kumar, B Rajini Kanth and P. K. Mukhopadhyay; National Conference On Condensed Matter Physics, (CM DAYS), The University of Burdwan, Burdwan, West Bengal, India, 29-31 August, 2018
  1. Martensitic Transformation and Mechanical Behavior of Nano-structured Ni-Mn-Ga/Si (100) Thin Film.
    Vinodh Kumar, M. Mahendran, Md Sarowar Hossain and P.K. Mukhopadhyay, National Conference On Condensed Matter Physics, (CM DAYS), The University of Burdwan, Burdwan, West Bengal, India, 29-31 August, 2018.
  2. Structural anomaly and elastic moduli in disordered magnetic alloys
    Md. Sarowar Hossain, B. Rajini Kanth, P. K. Mukhopadhyay, International Conference on Nanotechnology and Condensed Matter Physics (ICNCMP 2018), 11–12 January, 2018, BUET, Dhaka, Bangladesh.
  1. Annealing effect on Magneto-transport property and Stress induced dynamic elastic moduli on a Co-Ni-Al FSMA
    Rajini Kanth, Md Sarowar Hossain, and P. K. Mukhopadhyay, International Conference on Nanotechnology and Condensed Matter Physics 2018 (ICNCMP 2018), 11–12 January, 2018, BUET, Dhaka, Bangladesh.
  2. Effect of composition on elastic moduli for a Co-Ni-Al system
    K. Mukhopadhyay, Md. Sarowar Hossain, B. Rajini Kanth, S. Vinodh Kumar, International Conference on Nanotechnology and Condensed Matter Physics 2018 (ICNCMP 2018), 11–12 January, 2018, BUET, Dhaka, Bangladesh.
  3. Scientific Progress on Smart Materials
    Sarowar Hossain, S. Vinodh Kumar, Suman Sarkar, Abhishek Bagchi, Gurdeep Singh, Susmita Dey, P K Mukhopadhyay, INDUSTRY ACADEMIA MEET, S N Bose National Centre For Basic Sciences, Saltlake, Kolkata, India, 6 th October, 2018.

National and international scholarships and awards:

  1. TWAS-Bose Postgraduate award, ICTP, Italy.
  2. Best Poster award at Bose Fest 2015, S N Bose National Centre for Basic Sciences, India
  3. Best Paper award on ultrasonic application, 2016, NSU, India.
  4. Education board organization, Bangladesh Govt. scholarship.
  5. Junior Scholarship with first grade. (in class viii)