Dr Bhaskar Kaviraj
Assistant Professor School of Natural Sciences
School of Natural Sciences
Email: bhaskar.kaviraj@snu.edu.in
Two dimensional materials for device applications Two-dimensional materials such as graphene and transition metal dichalcogenides (TMDC) such as MoS2, WSe2, MoSe2, MoTe2, etc have emerged as brand new photonic materials due to their unique properties and multiple functions. TMDS's are atomicall...
Research Overview
Two dimensional materials for device applications Two-dimensional materials such as graphene and transition metal dichalcogenides (TMDC) such as MoS2, WSe2, MoSe2, MoTe2, etc have emerged as brand new photonic materials due to their unique properties and multiple functions. TMDS's are atomically thin semiconductors of the type MX2 with a transition metal (M) atom and a chalcogen (X) atom (S, Se, Te). One layer of M atoms is sandwiched between two layers of X atoms. They are the part of the family of 2D materials,a name to emphasize their thickness. The discovery of graphene shows different properties emerge when a bulk crystal of macroscopic dimensions is thinned down to atomic layers.Like graphite,TMD bulk crystals are formed of monolayers bound to each other by Van der Waals attraction. Our research group exploits several interesting properties of TMDC's mentioned below to investigate photocatalytic dye degradation, hydrogen evolution reaction (HER), supercapacitors and many other physical phenomena (i)TMD monolayersMoS2,WS2,MoSe2,WSe2,MoTe2have adirect band gap, and can be used in electronics astransistorsand in optics as emitters and detectors. (ii)The TMD monolayer crystal structure has no inversion center, which allows to access a new degree of freedom of charge carriers, namely the k-valley index, and to open up a new field of physics:valleytronics (iii)The strongspin-orbit couplingin TMD monolayers leads to a spin-orbit splittingof hundreds meV in thevalence bandand a few meV in theconduction band, which allows control of the electron spin by tuning the excitation laser photon energy and handedness.The work on TMD monolayers is an emerging research and development field since the discovery of the direct bandgapand the potential applications in electronicsand valley physics.TMDs are often combined with other2D materialslikegrapheneandhexagonal boron nitrideto makevan der Waals heterostructure. These heterostructures need to be optimized to be possibly used as building blocks for many different devices such as transistors,solar cells,LEDs,photodetectors,fuel cells,photocatalyticand sensing devices. Some of these devices are already used in everyday life and can become smaller, cheaper and more efficient by using TMD monolayers.
Education
2007, Ph.D., Indian Institute of Technology Kharagpur 1998, Master of Science, Jadavpur University 1996, Bachelor of Science, Burdwan University
Experience
12/13-Present Assistant Professor, Department of Physics, School of Natural Sciences, Shiv Nadar University, Delhi-NCR 07/13-11/13 Visiting Faculty, Indian Institute of Science Education and Research (IISER), Bhopal, India 02/13-03/13 Post-doctoral research Associate, Kyoto University, Japan 01/11-12/12 MANA Research Associate, National Institute of Materials Science, Tsukuba, Japan 02/09-01/11 Research Engineer, CEA (French Atomic Energy Commission), Grenoble, France 02/08-01/09 Post-Doctoral Research Associate, Georgia State University, Atlanta, USA 01/07-01/08 Post-Doctoral Research Associate, Laboratory of Electrical Engineering in Paris (LGEP), Paris, France
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Article Open access
Tailoring optical properties of pulsed laser deposition grown epitaxial SrTiO3 thin films by tantalum doping
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Arya, M.; Kumar, S.; Santra, B.; Das, G.; Aquilanti, G.; Ojha, S.; Bhasin, V.; Bhattacharyya, D.; Reddy, V.; Dhar, S.; Kaviraj, B.; Kanjilal, A. | Journal of Applied Physics, 138(4) | 2025 | 0 |
| 2 |
Article
Tuning Interfacial Charge Transfer and Exploring Morphological Insight in Biocarbon/MoSe2 Heterostructures for Enhanced Photodegradation of Organic Pollutants
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Tyagi, S.; Agarwal, S.; Mahapatra, B.K.; Kaviraj, B. | Advanced Sustainable Systems, 9(6) | 2025 | 1 |
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Erratum Open access
Retraction note: Cost effective liquid phase exfoliation of MoS2 nanosheets and photocatalytic activity for wastewater treatment enforced by visible light (Scientific Reports, (2020), 10, 1, (10759), 10.1038/s41598-020-67683-2)
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Sahoo, D.; Kumar, B.; Sinha, J.; Ghosh, S.; Sinha Roy, S.S.; Kaviraj, B. | Scientific Reports, 14(1) | 2024 | 0 |
| 4 |
Article
Single-Step Synthesis of Ni-Doped MoS2 Nanostructures for Symmetrical Supercapacitor Devices
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Panghal, A.; Sahoo, D.; Deepak, D.; Deshmukh, S.; Kaviraj, B.; Sinha Roy, S.S. | ACS Applied Nano Materials, 7(5), 5358-5371 | 2024 | 22 |
| 5 |
Article
Cost-Effective and Highly Efficient Manganese-Doped MoS2Nanosheets as Visible-Light-Driven Photocatalysts for Wastewater Treatment
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Sahoo, D.; Tyagi, S.; Agarwal, S.; Shakya, J.; Ali, N.; Yoo, W.J.; Kaviraj, B. | Langmuir, 39(20), 7109-7121 | 2023 | 12 |
| 6 |
Review
Review—Magnetic Skyrmions in Chiral Ferromagnets: Electrical Transport Properties and Device Applications
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Kaviraj, B.; Sinha, J. | ECS Journal of Solid State Science and Technology, 11(11) | 2022 | 4 |
| 7 |
Article Open access
High-Performance MnO2 Nanowire/MoS2 Nanosheet Composite for a Symmetrical Solid-State Supercapacitor
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Sahoo, D.; Shakya, J.; Choudhury, S.; Sinha Roy, S.S.; Devi, L.; Singh, B.; Ghosh, S.; Kaviraj, B. | ACS Omega, 7(20), 16895-16905 | 2022 | 58 |
| 8 |
Article Open access
A simple two-step strategy to synthesize defect-rich MoS2nanocrystals for enhanced electrochemical hydrogen evolution
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Sahoo, D.; Shakya, J.; Choudhry, S.; Singh, B.; Kaviraj, B. | AIP Advances, 12(3) | 2022 | 5 |
| 9 |
Article
Edge Rich Ultrathin Layered MoS2Nanostructures for Superior Visible Light Photocatalytic Activity
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Sahoo, D.; Shakya, J.; Ali, N.; Yoo, W.J.; Kaviraj, B. | Langmuir, 38(4), 1578-1588 | 2022 | 35 |
| 10 |
Article Open access
Cost-effective synthesis of 2D molybdenum disulfide (MoS2) nanocrystals: An exploration of the influence on cellular uptake, cytotoxicity, and bio-imaging
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Sahoo, D.; Behera, S.P.; Shakya, J.; Kaviraj, B. | PLoS ONE, 17(2026-01-01 00:00:00) | 2022 | 10 |
| 11 |
Erratum Open access
Retraction: Physics of excitons and their transport in two dimensional transition metal dichalcogenide semiconductors (RSC Adv. (2019) 9 (25439–25461) DOI: 10.1039/c9ra03769a)
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Kaviraj, B.; Sahoo, D. | RSC Advances, 11(21), 12866-nan | 2021 | 2 |
| 12 |
Retracted Open access
Cost effective liquid phase exfoliation of MoS2 nanosheets and photocatalytic activity for wastewater treatment enforced by visible light
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Sahoo, D.; Kumar, B.; Sinha, J.; Ghosh, S.; Sinha Roy, S.; Kaviraj, B. | Scientific Reports, 10(1) | 2020 | 140 |
| 13 |
Conference paper
Strongly luminescent MoS2nanosheets prepared by liquid phase exfoliation without any surfactant
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Sahoo, D.; Singh, B.; Kaviraj, B. | AIP Conference Proceedings, 2220 | 2020 | 3 |
| 14 |
Retracted Open access
Physics of excitons and their transport in two dimensional transition metal dichalcogenide semiconductors
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Kaviraj, B.; Sahoo, D. | RSC Advances, 9(44), 25439-25461 | 2019 | 28 |
| 15 |
Article Open access
Magnetic properties of microwave-plasma (thermal) chemical vapour deposited Co-filled (Fe-filled) multiwall carbon nanotubes: Comparative study for magnetic device applications
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Mathur, A.; Maity, T.; Wadhwa, S.; Ghosh, B.; Sarma, S.; Ray, S.C.; Kaviraj, B.; Sinha Roy, S.S.; Roy, S. | Materials Research Express, 5(7) | 2018 | 3 |
| 16 |
Article Open access
Relativistic torques induced by currents in magnetic materials: physics and experiments
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Kaviraj, B.; Sinha, J. | RSC Advances, 8(44), 25079-25093 | 2018 | 3 |
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Research contributions aligned with UN Sustainable Development Goals:
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Awards & Honors
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