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Dr. R.K. Kotnala
Born
Ravinder Kumar Kotnala

October 2, 1957 (1957-10-02) (age 66)
Kotnali village, Uttarakhand,India
NationalityIndian
Education
OccupationScientist
Years active1982–Present
Notable workHydroelectric Cell
Websitehttps://www.rkkotnala.com/

Ravinder Kumar Kotnala[1][2] known as R.K. Kotnala is an Indian scientist. known for his work on technologies like Hydroelectric Cell[3], Solar Cell, Magnetic Materials & Magnetic Field Measurements and many others. in his 40 years of career as a scientist Kotnala served in many organizations such as National Physical Laboratory, Department of Atomic Energy, and National Accreditation Board for Testing and Calibration Laboratories (NABL). He is a member of Sigma Xi, Kotnala was selected in World Ranking of Top 2% Scientists published by Stanford University in the year 2021.

Through his research & inventions Kotnala Advocates for the use of green energy solutions to combat global warming and climate change. He is also creating awareness for science among youth through numerous invited talks and YouTube videos on simple scientific concepts.

Kotnala has written sevral books & published various research articles on EMI Shielding[4], Humidity Sensing[5], Hydroelectric Cell[6], Nano Magnetic Materials[7], Chalcogenides[8], Multiferroic & Spintronics[9], Environmental Sciences & Solar Cell, Super Conductors & Supercapacitors[10] in journals such as Arabian Journal of Chemistry[11] and Bulletin of Materials Science[12] published by Springer Science Business Media on behalf of the Indian Academy of Sciences in collaboration with the Materials Research Society of India and the Indian National Science Academy.

Early life and education

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Ravinder Kumar Kotnala was born 2 October 1957, in Kotnali village of Uttarakhand.[citation needed] Kotnala completed his schooling at a Delhi government school. He then complated his Bachelor's Degree from Delhi University.[citation needed] Kotnala received his Ph.D. in silicon solar cells from IIT Delhi in 1982.[citation needed]

Career as a scientist

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Kotnala joined the National Physical Laboratory as a Scientist in 1982, working till 2017. in 2018 he started working for Rajaramanna Fellow in where he was Adviser for Magnetic Field Measurements in the INO project in Department of Atomic Energy. in 2020 he becomae the Chairman of National Accreditation Board for Testing and Calibration Laboratories (NABL). Kotnala Established the first Primary Standards Lab on magnetic measurements in India. he has also searved as Chief Scientist and Head, Environmental Sciences & Biomedical Metrology in CSIR-NPL.[13][14]

Scientific Contributions

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Hydroelectric Cell

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Dr.Kotnala Invented of the hydroelectric cell[15] which generates green electricity by water splitting at room temperature. hydroelectric cell doent use any chemical for Producing electricity.[16]

Research and development in the fields of multiferroics, spintronics, and magnetics.

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Extensive research and development in the fields of multiferroics, spintronics, and magnetics.[citation needed]

Electromagnetic sensors

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Significant involvement in developing electromagnetic sensors with the Office of Naval Research (ONR), Washington, USA.[citation needed]

Establishment of advanced measurement techniques for magnetic materials.

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Pioneering work in geomagnetism and the establishment of advanced measurement techniques for magnetic materials.[citation needed]

Patents

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Awards and honours

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Kotnala has received many awards and honors for his scientific achievements and fellowships from prestigious scientific societies, Kotnala is one of the Honorary Professor at Amity Institute of Nanotechnology[18], Noida. some more are as below:

Year of award/honor Name of award or honour Awarding organization Ref.
1989-90 Visiting Scientists Tokyo Institute of Technology, Japan
2008 MRSI Medal Award in Material Science (Magnetic Materials) Materials Research Society of India (MRSI) [19]
2013 Academician Asia Pacific Academy of Materials (APAM) [20]
2015 Fellow, National Academy of Sciences (NASI) National Academy of Sciences, Allahabad [21]
2017 International Healthcare Service Excellence Award UBM, London
2018 Renewable Energy India Award UBM, London
2018 Raja Ramanna Fellow Department of Atomic Energy, India
2020 Chairman of National Accreditation Board for Testing and Calibration Laboratories (NABL) Quality Council of India [22]
2010 Office of Naval Research (ONR) Contract Project Award Washington, USA
2012 Outstanding R&D Team Award CSIR
2013 Editorial Board Member J. Nanoparticle Research, Springer Publishers
2015-2020 Associate Editor J. Physics, Parmana, Indian Academy of Sciences, Bangalore
2014-2018 Associate Editor J. Applied Physics (AIP), USA
2017-present Associate Editor IET Science, Measurement & Technology, London, UK
2013-present Vice President Magnetic Society of India (MSI), Hyderabad
2018-present President Society for Scientific Values (SSV) [23]
2018-present President Society for Environment Awareness & Protection (SEAP)

Writings & Publications

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Books

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  • Multiferroics: Nanoparticles and Thin Films, LAP LAMBERT Academic Publishing, (2016).[24]
  • Essentials of Solar Cells - R.K. Kotnala, N.P. Singh, Allied Publisher Pvt. Ltd., (1986).[25]
  • Electrical & Mechanical Engineering - N.K. Bansal and R.K. Kotnala, Laxmi Publication, (1989).
  • Basic Physics for I.I.T. - R.K. Kotnala and V.K. Kotnala, Allied Publishers Pvt. Ltd., (1987).
  • Elements of Electronic Instrumentation, Laxmi Publications, (1995).
  • Ethical Issues of Nanotechnology, Chapter in New Nanotechniques, Nova Science Publishers, (2009).
  • Hydroelectric Cell: An Alternative to Solar Cell and Fuel Cell for Masses, Handbook of Magnetic Materials, Comprehensive Energy Systems, Elsevier, (2018).

Research Articles

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More then 500 research articles has published by kotnala in various journals, some of them are:

EMI Shielding

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Humidity Sensing

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  • Impedimetric humidity sensing studies of Ag doped MCM-41 mesoporous silica coated on silver sputtered interdigitated electrodes, Journal of Physics and Chemistry of Solids, 2020.
  • Humidity sensing of Mg doped MCM-41 on silver sputtered thin films, Journal of Materials Science: Materials in Electronics, 2019.
  • Synthesis and characterizations of highly ordered KCl–MCM–41 porous nanocomposites for impedimetric humidity sensing, Journal of Porous Materials, 2019.
  • Mesoporous silica mediated synthesis of α-Fe2O3 porous structures and their application as humidity sensors, Journal of Materials Science: Materials in Electronics, 2018.
  • Wide range humidity sensing of LiCl incorporated in mesoporous silica circular discs, Phase Transitions, 2017.
  • Resistive type humidity sensor based on porous magnesium ferrite pellet, US Patent, 2017.
  • Colossal humidoresistance in ceria added magnesium ferrite thin film by pulsed laser deposition, Sensors and Actuators B: Chemical, 2013.
  • Linear resistivity response with relative humidity of Gd doped magnesium ferrite, Sensors & Transducers, 2012.
  • Humidity sensing exclusively by physisorption of water vapors on magnesium ferrite, Sensors and Actuators B: Chemical, 2012.
  • Influence of annealing on humidity response of RF sputtered nanocrystalline MgFe2O4 thin films, Thin Solid Films, 2011.
  • Significant increase in humidity sensing characteristics of praseodymium doped magnesium ferrite, Sensors and Actuators A: Physical, 2011.
  • Study of humidity sensing property of LiCe substituted magnesium ferrite, Sensor Letters, 2009.
  • Role of modified active surface sites of magnesium ferrite for humidity sensing, Journal of optoelectronics and advanced materials, 2009.
  • Humidity response of Li-substituted magnesium ferrite, Sensors and Actuators B: Chemical, 2007.
  • Microstructure-dependent humidity sensitivity of porous MgFe2O4–CeO2 ceramic, Sensors and Actuators B: Chemical, 2007.

Hydroelectric Cell

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  • Optimization of mesoporous magnesium ferrite hydroelectric cells for sustainable green electricity generation via Zirconium doping, Ishfaq Ahmad Parray, Jyoti Shah, RK Kotnala, Syyed Asad Ali, Ceramics International, 2024.[30]
  • Green Energy Generation via Water Splitting by Non-Photocatalytic Process based on Gd Doped Magnesium Ferrite Hydroelectric Cell, Ishfaq Ahmad Parray, Syyed Asad Ali, Jyoti Shah, RK Kotnala, Journal of Alloys and Compounds, 2024.[31]
  • Morphological Impact on ZnO Material for Designing Hydroelectric Cell—A Way to Harness Green Electricity by Water Splitting, Chandra Prakash Priyambada Sahoo, Jyoti Shah, Ambesh Dixit, RK Kotnala, Energy Materials and Devices: Proceedings of E-MAD 2022, 2024.[32]

Magnetic Materials

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  • Energy storage and magnetoelectric coupling in neodymium (Nd) doped BiFeO3-PbTiO3 solid solution, Manoj Baloni, Ram Chhavi Sharma, Hemant Singh, Bushra Khan, Manoj K Singh, Prakash Chandra Sati, Vikas N Thakur, RK Kotnala, Ashok Kumar, Journal of Alloys and Compounds, Elsevier, Volume 946, Pages 169333, June 2023.[33]
  • Calcination Temperature Induced Structural, Optical and Magnetic Transformations in Titanium Ferrite Nanoparticles, A Shukla, SC Singh, A Bhardwaj, RK Kotnala, KN Uttam, C Guo, R Gopal, Reactions 3 (1), 224-232, 2022.[34]
  • Target phase-induced compositional control in liquid-phase pulsed laser ablation produced titanium ferrite nanomaterials, A Shukla, SC Singh, RK Kotnala, KN Uttam, C Guo, R Gopal, Bulletin of Materials Science 44 (2), 1-9, 2021.[35]

Multiferroic & Spintronics

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  • Phase evolution and enhanced electrical properties in Ba0.85Ca0.15Zr0.10Ti0.90O3 lead-free ceramics prepared at different sintering temperatures, S Sharma, R Nandan, J Shah, RK Kotnala, NS Negi, Phase Transitions, 1-17, 2022.[36]
  • Enhanced multiferroic properties and magnetoelectric coupling in Nd modified 0.7 BiFeO3–0.3 PbTiO3 solid solution, M Baloni, RC Sharma, H Singh, B Khan, MK Singh, PC Sati, M Rawat, VN Thakur, A. Kumar, RK Kotnala, Journal of Materials Science: Materials in Electronics 33 (21), 17161-17173,[37]
  • A review on current status and mechanisms of room-temperature magnetoelectric coupling in multiferroics For device applications, R Gupta, RK Kotnala, Journal of Materials Science, 1-28, 2022.[38]

Superconductors & Supercapacitors

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  • Energy storage and magnetoelectric coupling in neodymium (Nd) doped BiFeO3-PbTiO3 solid solution. Manoj Baloni, Ram Chhavi Sharma, Hemant Singh, Bushra Khan, Manoj K Singh, Prakash Chandra Sati, Vikas N Thakur, RK Kotnala, Ashok Kumar, Journal of Alloys and Compounds, Elsevier, Vol. 946, Pages 169333, 2023.[39]
  • Fabrication of activated carbon electrodes derived from peanut shell for high-performance supercapacitors, L Pandey, S Sarkar, A Arya, AL Sharma, A Panwar, RK Kotnala, A Gaur, Biomass Conversion and Biorefinery, 1-10, 2021.[40]
  • Observation of superparamagnetism in ultra-fine ZnxFe1− xFe2O4 nanocrystals synthesized by co-precipitation method, N Kumar, G Khurana, A Gaur, RK Kotnala, Materials Chemistry and Physics 134 (2-3), 783-788, 2012.[41]

See also

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References

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  1. ^ "Electricity-from-water scientist seeks commercialisation of invention". The Economic Times. December 20, 2016. ISSN 0013-0389. Retrieved July 23, 2024.
  2. ^ https://www.longdom.org/open-access-pdfs/hydroelectric-cell-path-breaking-invention-for-green-electricity-production-by-splitting-of-water-an-alternative-to-sola.pdf
  3. ^ "Indian scientists produce electricity from water without using energy: Know all about it". India Today. October 20, 2016. Retrieved July 23, 2024.
  4. ^ "Electromagnetic interference shielding performance by thermally stable magnesium ferrite encapsulated polythiophene com…". ouci.dntb.gov.ua (in Ukrainian). Retrieved July 27, 2024.
  5. ^ Kunchakara, Suhasini; Ratan, Amar; Dutt, Meenakshi; Shah, Jyoti; Kotnala, R. K.; Singh, Vaishali (October 1, 2020). "Impedimetric humidity sensing studies of Ag doped MCM-41 mesoporous silica coated on silver sputtered interdigitated electrodes". Journal of Physics and Chemistry of Solids. 145: 109531. Bibcode:2020JPCS..14509531K. doi:10.1016/j.jpcs.2020.109531. ISSN 0022-3697.
  6. ^ Dhall, Monika; Khasa, Satish; Hooda, Ashima; Shah, Jyoti; Kotnala, R.K. (May 2024). "Nanocomposite NBT-MFO for eco-friendly power generation: Self sustainable hydroelectric cell". Ceramics International. 50 (10): 17570–17592. doi:10.1016/j.ceramint.2024.02.247.
  7. ^ Baloni, Manoj; Sharma, Ram Chhavi; Singh, Hemant; Khan, Bushra; Singh, Manoj K.; Sati, Prakash Chandra; Thakur, Vikas N.; Kotnala, R. K.; Kumar, Ashok (June 15, 2023). "Energy storage and magnetoelectric coupling in neodymium (Nd) doped BiFeO3-PbTiO3 solid solution". Journal of Alloys and Compounds. 946: 169333. doi:10.1016/j.jallcom.2023.169333. ISSN 0925-8388.
  8. ^ Kang, Jasmeen; Kotnala, R. K.; Tripathi, S. K. (October 1, 2023). "Compositional effects of Ga incorporation on electrical and dielectric parameters in Ge-Se-Sb-Ga thin films". Materials Science and Engineering: B. 296: 116689. doi:10.1016/j.mseb.2023.116689. ISSN 0921-5107.
  9. ^ Verma, K. C.; Goyal, Navdeep; Kotnala, R. K. (February 1, 2019). "Tuning magnetism in 0.25BaTiO3-0.75CoFe2O4 hetero-nanostructure to control ferroelectric polarization". Physica B Condensed Matter. 554: 9–16. Bibcode:2019PhyB..554....9V. doi:10.1016/j.physb.2018.11.009. ISSN 0921-4526.
  10. ^ Baloni, Manoj; Sharma, Ram Chhavi; Singh, Hemant; Khan, Bushra; Singh, Manoj K.; Sati, Prakash Chandra; Thakur, Vikas N.; Kotnala, R. K.; Kumar, Ashok (June 15, 2023). "Energy storage and magnetoelectric coupling in neodymium (Nd) doped BiFeO3-PbTiO3 solid solution". Journal of Alloys and Compounds. 946: 169333. doi:10.1016/j.jallcom.2023.169333. ISSN 0925-8388.
  11. ^ Dar, M. Abdullah; Majid, Kowsar; Farukh, M.; Dhawan, S. K.; Kotnala, R. K.; Shah, Jyoti (December 1, 2019). "Electromagnetic attributes a dominant factor for the enhanced EMI shielding of PANI/Li0.5Fe2.5−xGdxO4 core shell structured nanomaterial". Arabian Journal of Chemistry. 12 (8): 5111–5119. doi:10.1016/j.arabjc.2016.12.001. ISSN 1878-5352.
  12. ^ "Bulletin of Materials Science | Indian Academy of Sciences". www.ias.ac.in. Retrieved July 27, 2024.
  13. ^ https://pib.gov.in/newsite/PrintRelease.aspx?relid=186387. {{cite web}}: Missing or empty |title= (help)
  14. ^ https://pib.gov.in/PressReleasePage.aspx?PRID=1484839. {{cite web}}: Missing or empty |title= (help)
  15. ^ "From the lab: Water current". The Indian Express. July 17, 2016. Retrieved July 27, 2024.
  16. ^ https://www.business-standard.com/article/news-ians/electricity-from-water-scientist-seeks-commercialisation-of-invention-116122000487_1.html. {{cite news}}: Missing or empty |title= (help)
  17. ^ "Lithium-substituted magnesium ferrite material based hydroelectric cell and process for preparation thereof".
  18. ^ "::: Amity Institute of Nano Technology :::". www.amity.edu. Retrieved July 27, 2024.
  19. ^ "Materials Research Society of India". www.mrsi.org.in. Retrieved July 27, 2024.
  20. ^ "Academicians----Asia Pacific Academy of Materials". www.apam-mat.net. Retrieved July 23, 2024.
  21. ^ https://nasi.org.in/fellows/kotnala-r-k/
  22. ^ https://nabl-india.org/wp-content/uploads/2020/10/Detailed-Profile-of-Prof-R-K-Kotnala.pdf
  23. ^ "Society For Scientific Values - Executive Council". www.scientificvalues.org. Retrieved July 27, 2024.
  24. ^ Multiferroics: Nanoparticles and Thin Films. LAP LAMBERT Academic Publishing (published April 22, 2016). 2016. ISBN 978-3659880193.
  25. ^ Kotnala, R. K. (1986). Essentials of Solar Cell. Allied Publishers Private.
  26. ^ Iqbal, Sajid; Khatoon, Halima; Kotnala, R. K.; Ahmad, Sharif (July 1, 2021). "Electromagnetic interference shielding performance by thermally stable magnesium ferrite encapsulated polythiophene composite". Journal of Materials Science: Materials in Electronics. 32 (14): 19191–19202. doi:10.1007/s10854-021-06441-0. ISSN 1573-482X.
  27. ^ Agrawal, Rekha; Shah, Jyoti; Gupta, Govind; Srivastava, Ritu; Sharma, Chhemendra; Kotnala, Ravinder (December 20, 2020). "Significantly high electromagnetic shielding effectiveness in polypyrrole synthesized by eco-friendly and cost-effective technique". Journal of Applied Polymer Science. 137 (48). doi:10.1002/app.49566. ISSN 0021-8995.
  28. ^ Iqbal, Sajid; Khatoon, Halima; Kotnala, R. K.; Ahmad, Sharif (November 1, 2020). "Bi-doped barium ferrite decorated polythiophene nanocomposite: influence of Bi-doping on structure, morphology, thermal and EMI shielding behavior for X-band". Journal of Materials Science. 55 (33): 15894–15907. Bibcode:2020JMatS..5515894I. doi:10.1007/s10853-020-05134-z. ISSN 1573-4803.
  29. ^ Dar, M. Abdullah; Majid, Kowsar; Farukh, M.; Dhawan, S. K.; Kotnala, R. K.; Shah, Jyoti (December 1, 2019). "Electromagnetic attributes a dominant factor for the enhanced EMI shielding of PANI/Li0.5Fe2.5−xGdxO4 core shell structured nanomaterial". Arabian Journal of Chemistry. 12 (8): 5111–5119. doi:10.1016/j.arabjc.2016.12.001. ISSN 1878-5352.
  30. ^ Parray, Ishfaq Ahmad; Shah, Jyoti; Kotnala, R. K.; Ali, Syyed Asad (June 15, 2024). "Optimization of mesoporous magnesium ferrite hydroelectric cells for sustainable green electricity generation via Zirconium doping". Ceramics International. 50 (12): 20982–20993. doi:10.1016/j.ceramint.2024.03.196. ISSN 0272-8842.
  31. ^ https://papers.ssrn.com/sol3/papers.cfm?abstract_id=4623639
  32. ^ Sahoo, Priyambada; Prakash, Chandra; Shah, Jyoti; Dixit, Ambesh; Kotnala, R. K. (2024). "Morphological Impact on ZnO Material for Designing Hydroelectric Cell—A Way to Harness Green Electricity by Water Splitting". In Dixit, Ambesh; Singh, Vijay K.; Ahmad, Shahab (eds.). Energy Materials and Devices. Advances in Sustainability Science and Technology. Singapore: Springer Nature. pp. 313–324. doi:10.1007/978-981-99-9009-2_23. ISBN 978-981-99-9009-2.
  33. ^ Baloni, Manoj; Sharma, Ram Chhavi; Singh, Hemant; Khan, Bushra; Singh, Manoj K.; Sati, Prakash Chandra; Thakur, Vikas N.; Kotnala, R. K.; Kumar, Ashok (June 15, 2023). "Energy storage and magnetoelectric coupling in neodymium (Nd) doped BiFeO3-PbTiO3 solid solution". Journal of Alloys and Compounds. 946: 169333. doi:10.1016/j.jallcom.2023.169333. ISSN 0925-8388.
  34. ^ Shukla, Abhishek; Singh, Subhash C.; Bhardwaj, Abhishek; Kotnala, Ravindra Kumar; Uttam, Kailash Narayan; Guo, Chunlei; Gopal, Ram (March 2022). "Calcination Temperature Induced Structural, Optical and Magnetic Transformations in Titanium Ferrite Nanoparticles". Reactions. 3 (1): 224–232. doi:10.3390/reactions3010017. ISSN 2624-781X.
  35. ^ Shukla, Abhishek; Singh, Subhash C.; Kotnala, R. K.; Uttam, K. N.; Guo, Chunlei; Gopal, R. (May 24, 2021). "Target phase-induced compositional control in liquid-phase pulsed laser ablation produced titanium ferrite nanomaterials". Bulletin of Materials Science. 44 (2): 152. doi:10.1007/s12034-021-02431-4. ISSN 0973-7669.
  36. ^ Sharma, Sarita; Nandan, Revti; Shah, Jyoti; Kotnala, Ravinder Kumar; Negi, Nainjeet Singh (September 2, 2022). "Phase evolution and enhanced electrical properties in Ba 0.85 Ca 0.15 Zr 0.10 Ti 0.90 O 3 lead-free ceramics prepared at different sintering temperatures". Phase Transitions. 95 (8–9): 609–625. doi:10.1080/01411863.2022.2098740. ISSN 0141-1863.
  37. ^ Baloni, Manoj; Sharma, Ram Chhavi; Singh, Hemant; Khan, Bushra; Singh, Manoj K.; Sati, Prakash Chandra; Rawat, Meera; Thakur, Vikas N.; Kumar, Ashok; Kotnala, R. K. (July 1, 2022). "Enhanced multiferroic properties and magnetoelectric coupling in Nd modified 0.7BiFeO3–0.3PbTiO3 solid solution". Journal of Materials Science: Materials in Electronics. 33 (21): 17161–17173. doi:10.1007/s10854-022-08592-0. ISSN 1573-482X.
  38. ^ Gupta, Rekha; Kotnala, R. K. (July 1, 2022). "A review on current status and mechanisms of room-temperature magnetoelectric coupling in multiferroics for device applications". Journal of Materials Science. 57 (27): 12710–12737. Bibcode:2022JMatS..5712710G. doi:10.1007/s10853-022-07377-4. ISSN 1573-4803.
  39. ^ Baloni, Manoj; Sharma, Ram Chhavi; Singh, Hemant; Khan, Bushra; Singh, Manoj K.; Sati, Prakash Chandra; Thakur, Vikas N.; Kotnala, R. K.; Kumar, Ashok (June 15, 2023). "Energy storage and magnetoelectric coupling in neodymium (Nd) doped BiFeO3-PbTiO3 solid solution". Journal of Alloys and Compounds. 946: 169333. doi:10.1016/j.jallcom.2023.169333. ISSN 0925-8388.
  40. ^ Pandey, Lokesh; Sarkar, Subhajit; Arya, Anil; Sharma, A. L.; Panwar, Amrish; Kotnala, R. K.; Gaur, Anurag (June 1, 2023). "Fabrication of activated carbon electrodes derived from peanut shell for high-performance supercapacitors". Biomass Conversion and Biorefinery. 13 (8): 6737–6746. doi:10.1007/s13399-021-01701-9. ISSN 2190-6823.
  41. ^ Kumar, Nitu; Khurana, Geetika; Gaur, Anurag; Kotnala, R. K. (June 15, 2012). "Observation of superparamagnetism in ultra-fine ZnxFe1−xFe2O4 nanocrystals synthesized by co-precipitation method". Materials Chemistry and Physics. 134 (2): 783–788. doi:10.1016/j.matchemphys.2012.03.069. ISSN 0254-0584.
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