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Dr. Subir Roy

Dr. Subir Roy

Assistant Professor

About

Dr. Subir Roy is an Assistant Professor at RV University, Bangalore, with a deep passion for exploring the physics and applications of nanomaterials. He earned his Ph.D. from the Centre for Nano and Soft Matter Sciences (CeNS), Bangalore — a premier national research laboratory under the Department of Science and Technology, Government of India — where his doctoral work focused on metal oxide-based nanomaterials for multifunctional applications.

Following his doctorate, Dr. Roy pursued two prestigious international postdoctoral fellowships: first at the University of Manitoba, Canada, and subsequently at ISMN-CNR Bologna, Italy, where he broadened his expertise into molecular spintronics and spin-based memory devices.

His research interests span nanomagnetism, magnetotransport phenomena, spintronics for neuromorphic computing, 2D materials, quantum sensing, and electrocatalysis for clean energy. He is skilled in advanced thin film deposition, micro-electrode fabrication, low-temperature electrical transport measurements, and a wide range of materials characterisation techniques.

Beyond research, Dr. Roy is an enthusiastic educator with experience teaching physics at university and competitive examination levels. He is committed to inspiring scientific curiosity in students at all stages of their academic journey.

Albert Einstein — "The most beautiful thing we can experience is the mysterious. It is the source of all true art and science."

S. Roy, GK Uppal, A Acosta, R Nickel, CA Roberts, J Lierop, “Chemical Pressure Induced Strain Control of Magnetic Anisotropy in the Simple Perovskite ϵ-Fe2O3” Nano Lett. 26, 34–41 (2026). https://doi.org/10.1021/acs.nanolett.5c04373.
S. Roy, Alberto Riminucci, “Perspectives on molecular spin-based memories” APL Mater. 13, 070901 (2025). https://doi.org/10.1063/5.0274112.
S. Roy, Alex C, N. K. M. Safeer, A. Paul, N. S. John, S. Angappane, “Role of active redox sites and charge transport resistance at reaction potentials in spinel ferrites for improved oxygen evolution reaction” J. Electroanal. Chem. 972, 118613 (2024). https://doi.org/10.1016/j.jelechem.2024.118613.
N. Rao, Alex C., M. Mukherjee, S. Roy, A. Tayal, A. Datta, N. S. John, "Evidence for exclusive direct mechanism of urea electro-oxidation driven by in-situ generated resilient active species on a rare earth-nickelate" ACS Catal. 14, 981 (2024). https://doi.org/10.1021/acscatal.3c04967.
V. G. Natha, S. Ray, J. D. Rodneyd, S. P. Bharath, S. Roy, K. Tarafder, A. Subramaniana, B. C. Kime, “Mechanistic insight and first principle analysis of cationinverted zinc ferrite nanostructure: A paradigm for ppb-level room temperature NOx sensor” Chemical Engineering Journal 490, 151873 (2024). https://doi.org/10.1016/j.cej.2024.151873.
S. Roy, Nikhita H. R., Varshini G.V., A. K. Patra, R. B. Gangineni, S. Angappane “Enhancement of room-temperature magnetoresistance in polyvinyl acetate encapsulated Fe3O4 nanoparticles” Journal of Magnetism and Magnetic Materials 557, 169468 (2022). https://doi.org/10.1016/j.jmmm.2022.169468.
S. Roy, R. Katoch, R. B. Gangineni and S. Angappane, “Investigation of metal-insulator transition and magnetic properties of NdNiO3 nanoparticles” Journal of Solid State Chemistry 294, 121865 (2021). https://doi.org/10.1016/j.jssc.2020.121865.
S. Roy, Iniyan S., Femy Francis, Varshini G.V., S. Angappane, “Observation of Room Temperature Magnetoresistance in Graphene / CoFe2O4 Nanocomposite” Physica Status Solidi B 258, 2100033 (2021). https://doi.org/10.1002/pssb.202100033.
S. Roy, R. Katoch, S. Angappane, “Extraordinary Ferromagnetic Coupling and Magnetodielectric Phenomena in NiO Nanoparticles” IEEE Transactions on Magnetics 55 (2), 1-4 (2019). 10.1109/TMAG.2018.2865678.
D.K. Rana, S.K. Singh, S.K. Kundu, S. Roy, S. Angappane, S. Basu, “Electrical and room temperature multiferroic properties of polyvinylidene fluoride nanocomposites doped with nickel ferrite nanoparticles” New Journal of Chemistry 43 (7), 3128-3138 (2019). https://doi.org/10.1039/C8NJ04755C.
S. Roy, R. Katoch, S. Angappane, “Large magnetoresistance in carbon-coated Ni/NiO nanoparticles” Bulletin of Materials Science 41 (5), 127 (2018). https://doi.org/10.1007/s12034-018-1645-8.
S. Roy, N. Kambhala, S. Angappane “Magnetocapacitance effect in core/shell NiO nanoparticles”, AIP Conference Proceedings 1942 (1), 050082 (2018).
Book chapter
Mattia Benini, Luca Gnoli, Subir Roy, Alberto Riminucci, Chapter One - Spin phenomena in molecular systems, molecule-interfaced magnetic materials and perspective applications, Editor(s): Robert L. Stamps, Rair Macêdo, Solid State Physics, Academic Press, Volume 76, Pages 1-52 (2025), ISSN 0081-1947, ISBN 9780443430435.

Synthesis and characterisation of metal oxide nanomaterials with multifunctional properties including magnetic, electrical, and optical behaviour.

Investigation of magnetoresistance, magnetoimpedance, and magnetodielectric phenomena in nanoparticles and nanocomposites, including low-temperature studies.

Exploration of metal-insulator transitions and magnetic phase transitions in rare earth nickelates.

Development of spintronics-based architectures for neuromorphic computing and artificial intelligence, including molecular spin-based memory devices.

Fabrication and study of 2D material composites (graphene-based) for room-temperature magnetoresistance applications.

Surface engineering of spinel ferrites and other nanomaterials for oxygen evolution reaction (OER) electrocatalysis towards clean energy production.

Perovskite solar cell fabrication with p-i-n geometry using NiOx hole transport layers.

Quantum sensing and the use of magnetic nanomaterials for potential biomedical applications.

Research Interests

Multifunctional nanomaterials

Nanomagnetism

Magnetotransport

Spintronics

Neuromorphic computing

2D materials

Quantum sensing

Rare earth nickelates

Electrocatalysis Clean energy

Biomedical nanomaterials

Gas sensing

Merit-cum-Means Scholarship, Government of West Bengal
Awarded by the Government of West Bengal to support meritorious students in pursuing higher education in science and technology.

JEST Qualification (Joint Entrance Screening Test)
Cleared the national-level JEST examination, enabling admission to Ph.D. programmes at premier research institutions across India.

Awarded competitive JRF (2016–2018) and SRF (2018–2021) fellowships by the Department of Science and Technology to pursue doctoral research at CeNS, Bangalore.

Award at "Magnetism as Art" Showcase, MMM 2020 Virtual Conference
Recognised at the international Magnetism and Magnetic Materials (MMM) 2020 virtual conference for an artistic submission highlighting the beauty of magnetic phenomena.

Dr. Subir Roy

Assistant Professor

PhD

School of Computer Science and Engineering

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