Department of Electrical Engineering, IIT Delhi soutik@ee.iitd.ac.in
Laboratory of Nanorobotics & Medical Devices

Publications

Journal publications

2026

  1. [35]
    A. Vishwakarma, N. Murali, A. Verma, S. Sabu, A. Rahman, S. Mondal, S. Betal, M. A. Spackman, S. C. Karumuthil, S. P. Thomas, Toward In Vivo Energy Harvesters: High Piezoelectric Response in a Pharmaceutical Drug Polymorph Enabled by Monopolar Domain Architecture Advanced Energy Materials (2026), published online 19 August 2026. DOI
  2. [34]
    Hemlata, N. Murali, S. Roy, … S. Betal, S. Minocha, pH-responsive dual-drug-loaded bovine serum albumin nanoparticles for targeted cancer therapy International Journal of Biological Macromolecules 365, 152319 (2026). DOI
  3. [33]
    S. B. Das, A. Rajput, N. Murali, … S. Betal, Bismuth ferrite hollow nanosphere for highly efficient electrocatalytic oxygen evolution reaction Materials Today Nano 34, 100824 (2026). DOI
  4. [32]
    N. Murali, Aastha, S. B. Das, … S. Betal, Magnetoelectrically enhanced molecular recognition on plasmonic surfaces Small 22 (27), e10657 (2026). DOI
  5. [31]
    A. T. Thodikayil, Hemlata, N. Murali, S. Minocha, S. Betal, S. Saha, Nano-enabled dual-responsive drug carrier originated from acetalated dextran / carboxylated nanocellulose-based core–shell microspheres ACS Biomaterials Science & Engineering 12 (2), 936–954 (2026). DOI
  6. [30]
    A. Sharma, S. Atta, S. Sharma, P. Mishra, S. Betal, S. Siddhanta, Critical interplay of defect engineering and plasmonics in hybrid nanostructures for ultrasensitive photo-enhanced Raman spectroscopy Nanoscale 18 (29), 15651–15664 (2026). DOI

2025

  1. [29]
    N. Murali, Hemlata, S. M. Bhat, … S. Betal, Surface-modified hollow and porous magnetoelectric nanosphere with disintegration capability for magnetically assisted catalytic degradation of organic pollutants Applied Surface Science 720, 165203 (2025). DOI
  2. [28]
    S. Atta, A. Kundu, S. B. Das, … S. Betal, Enhanced photo-electro-catalytic hydrogen evolution using LaFeO3-coated TiO2 hollow nanosphere Colloids and Surfaces A: Physicochemical and Engineering Aspects 726, 137934 (2025). DOI
  3. [27]
    Hemlata, N. Murali, S. Roy, … S. Betal, S. Minocha, Zebrafish as a versatile preclinical model for evaluating nanomedicine in biomedical research: recent advances and applications Journal of Drug Delivery Science and Technology 113, 107348 (2025). DOI
  4. [26]
    C. K. Raul, S. Dey, S. Atta, S. Betal, S. Basu, A. K. Meikap, Highly active [amorphous α-Ni(OH)2]–Au/MWCNT hybrid anode electrocatalyst for ethylene glycol electro-oxidation in fuel cells ChemistrySelect 10 (22) (2025). DOI
  5. [25]
    S. B. Das, A. Rajput, N. Murali, … S. Betal, Hydroelectric cell and hydrogen generation using magnesium-substituted cobalt ferrite nanomaterials Journal of Power Sources 632, 236349 (2025). DOI
  6. [24]
    Hemlata, A. Hariharan, N. Murali, … S. Betal, S. Minocha, Engineered BSA nanoparticles: synthesis, drug loading, and advanced characterization Biology Methods and Protocols 10 (1), bpaf066 (2025). DOI
  7. [23]
    M. Kaur, M. Dutta, S. Betal, N. Singh, Microgel-based modular 3D in vitro microfluidic cell culture platforms Biomaterials Science 13 (7), 1697–1708 (2025). DOI

2024

  1. [22]
    N. Murali, Hemlata, S. B. Das, … S. Betal, Nanorod inside hollow-nanosphere structured magnetoelectric nanocatalyst for remotely controlled electrocatalysis-assisted environmental remediation Chemosphere 364, 143232 (2024). DOI
  2. [21]
    S. B. Das, R. K. Singh, V. Kumar, N. Murali, S. Betal, Temperature-dependent structural, optical, magnetic and dielectric characteristics of cobalt nanoferrites Bulletin of Materials Science 47 (3) (2024). DOI
  3. [20]
    N. T. Beigh, N. Murali, F. T. Beigh, S. Betal, D. Mallick, Magnetically polarizable energy-efficient magnetoelectric core–shell nanocomposites for magnetic field sensing IEEE Sensors Journal 24 (15), 23613–23621 (2024). DOI
  4. [19]
    N. Murali, S. K. Rainu, A. Sharma, S. Siddhanta, N. Singh, S. Betal, Remotely controlled surface charge modulation of magnetoelectric nanogenerators for swift and efficient drug delivery ACS Omega 9 (26), 28937–28950 (2024). DOI
  5. [18]
    N. Murali, S. B. Das, S. Yadav, S. K. Rainu, N. Singh, S. Betal, Advanced biomimetic and biohybrid magnetic micro/nano-machines Advanced Materials Technologies 9 (19), 2400239 (2024). DOI

2023

  1. [17]
    D. K. Rana, P. S. Banerjee, S. Betal, S. S. Banerjee, Ultra-stretchable thermoplastic elastomeric materials based on styrene–isoprene–styrene triblock copolymer: influence of calcium copper titanate on mechanical and dielectric properties Journal of Applied Polymer Science 141 (4) (2023). DOI
  2. [16]
    N. Murali, D. Mukherjee, S. B. Das, … S. Betal, Magnetoelectric core–shell nanoparticle-based wearable hybrid energy harvesters for biomedical applications Advanced Engineering Materials 25 (21) (2023). DOI
  3. [15]
    S. Betal, A. S. Bhalla, R. Guo, Thermally controlled structural strain reduction in core–shell magnetoelectric nanocomposite Ferroelectrics 603 (1), 78–83 (2023). DOI

2022

  1. [14]
    S. Betal, A. S. Bhalla, R. Guo, High-speed propulsion of magnetoelectric nanovehicle actuated by bio-cellular electric field sensing Sensing and Bio-Sensing Research 38, 100521 (2022). DOI
  2. [13]
    N. Murali, S. K. Rainu, N. Singh, S. Betal, Advanced materials and processes for magnetically driven micro- and nano-machines for biomedical application Biosensors and Bioelectronics: X 11, 100206 (2022). DOI

2020

  1. [12]
    P. Tumurugoti, S. Betal, S. K. Sundaram, Hollandites’ crystal chemistry, properties, and processing: a review International Materials Reviews 66 (3), 141–159 (2020). DOI

2019

  1. [11]
    J. D. S. Guerra, R. J. Portugal, A. C. Silva, … A. S. Bhalla, Ferroic properties of nickel-ferrite-based ceramic composites at room temperature Ferroelectrics 545 (1), 150–155 (2019). DOI

2018

  1. [10]
    S. Betal, A. S. Bhalla, R. Guo, Interface studies in heterostructured core–shell magnetoelectric nanocomposites Ferroelectrics 534 (1), 89–94 (2018). DOI
  2. [9]
    S. Betal, A. K. Saha, E. Ortega, … R. Guo, Core–shell magnetoelectric nanorobot — a remotely controlled probe for targeted cell manipulation Scientific Reports 8 (1), 1755 (2018). DOI

2017

  1. [8]
    M. Dutta, K. Natarajan, S. Betal, R. P. Prasankumar, A. S. Bhalla, R. Guo, Magnetoelastoelectric coupling in core–shell nanoparticles enabling directional and mode-selective magnetic control of THz beam propagation Nanoscale 9 (35), 13052–13059 (2017). DOI

2016

  1. [7]
    M. Dutta, S. Betal, X. G. Peralta, A. S. Bhalla, R. Guo, Low-frequency piezoresonance-defined dynamic control of terahertz wave propagation Scientific Reports 6 (1), 38041 (2016). DOI
  2. [6]
    S. Betal, B. Shrestha, M. Dutta, … R. Guo, Magneto-elasto-electroporation (MEEP): in vitro visualization and numerical characteristics Scientific Reports 6 (1), 32019 (2016). DOI
  3. [5]
    S. Betal, M. Dutta, L. F. Cótica, A. S. Bhalla, R. Guo, Control of crystalline characteristics of shell in core–shell magnetoelectric nanoparticles studied using HRTEM and holography Ferroelectrics 503 (1), 68–76 (2016). DOI
  4. [4]
    L. F. Cótica, S. Betal, C. T. Morrow, S. Priya, R. Guo, A. S. Bhalla, Thermal effects in magnetoelectric properties of NiFe2O4 / Pb(Zr0.52Ti0.48)O3 / NiFe2O4 tri-layered composite Integrated Ferroelectrics 174 (1), 203–209 (2016). DOI
  5. [3]
    S. Betal, M. Dutta, B. Shrestha, … R. Guo, Cell permeation using core–shell magnetoelectric nanoparticles Integrated Ferroelectrics 174 (1), 186–194 (2016). DOI

2015

  1. [2]
    S. Betal, M. Dutta, L. F. Cótica, A. S. Bhalla, R. Guo, BaTiO3-coated CoFe2O4 core–shell magnetoelectric nanoparticles (CSMEN) characterization Integrated Ferroelectrics 166 (1), 225–231 (2015). DOI
  2. [1]
    J. D. S. Guerra, S. Betal, M. Pal, … A. S. Bhalla, Magnetoelectric response in (1−x)PbZr0.65Ti0.35O3 – xBaFe12O19 multiferroic ceramic composites Journal of the American Ceramic Society 98 (5), 1542–1547 (2015). DOI

Conference publications

  1. [4]
    N. Murali, D. Mukherjee, S. B. Das, D. Mallick, S. Betal, A system-level integration of wearable and flexible magnetoelectric nanogenerator for efficient energy harvesting IEEE Electron Devices Technology & Manufacturing Conference (EDTM) 1–3 (2024). DOI
  2. [3]
    S. Betal, M. Dutta, B. Shrestha, … R. Guo, Achieving magneto-elasto-electroporation and cell transport using core–shell magnetoelectric nanoparticles SPIE Proceedings (2016). DOI
  3. [2]
    S. Betal, M. Dutta, E. Khachatryan, … R. Guo, Photoacoustic and magnetoelastic property of cobalt ferrite nanoparticles and its attenuation with barium titanate coating SPIE Proceedings 9586, 958609 (2015), San Diego, CA. DOI
  4. [1]
    S. Betal, L. F. Cótica, S. Priya, A. S. Bhalla, R. Guo, Quantification of primary and secondary contribution on magnetoelectric effect of NiFe2O4 / Pb(Zr0.52Ti0.48)O3 / NiFe2O4 tri-layered composite Ceramic Transactions 87–93 (2015). MS&T 2014, Pittsburgh, PA. DOI