Overview
The primary focus of our research is the synthesis of semiconductor nanocrystals and metal-semiconductor hybrid structures. We are also interested in studying the optical and electronic properties of these materials.
Information
Prof. Ranjani Viswanatha
Professor
International Centre for Material Science, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore, India. 560064
email: rv@jncasr.ac.in
Phone: 080 2208 2573
Latest News
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Congratulations Mr. Prasenjit Mandal for successfully defending his thesis!
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Congratulations Mr. Saptarshi Chakraborty for successfully defending his thesis!
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Congratulations Ms. Payel Mondal for successfully defending her thesis!
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Congratulations Prof. Ranjani Viswanatha JNCASR for achieving SERB-POWER fellowship. This fellowship by Science and Engineering Research Board-SERB is awarded to recognise a woman scientist's outstanding performance in one's area of specialization
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Congratulations Ms. Mahima Makkar for successfully defending her thesis!
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Congratulations Mr. Pradeep KR for successfully defending his thesis!
Latest Publications
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Chakraborty S; Makkar M; Viswanatha R; Understanding Nanocrystals’ Dopant Edge X-ray Absorption Fine Structure (XAFS) Spectra: An Iterative Fitting Model. https://doi.org/10.1021/acs.jpcc.3c04078
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Chakraborty S; Dash G; Mannar S; Maurya KC; Das A; Narasimhan S; Saha B; Viswanatha R; Nonresonant Exciton–Plasmon Interaction in Metal–Chalcogenide (CuxS)/Perovskite (CsPbBr3) Based Colloidal Heterostructure. https://doi.org/10.1021/acs.jpcc.3c03331
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Chakraborty S; Mondal P; Makkar M; Moretti L; Cerullo G; Viswanatha R; Transition Metal Doping in CdS Quantum Dots: Diffusion, Magnetism, and Ultrafast Charge Carrier Dynamics. https://doi.org/10.1021/acs.chemmater.2c03776
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Mondal P; Sathiyamani S; Das S; Viswanatha R; Electronic structure study of dual-doped II–VI semiconductor quantum dots towards single-source white light emission. https://doi.org/10.1039/D3NR03542E
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Chakraborty S; Grandhi GK, Viswanatha R; Study of the Interface and Radial Dopant Position in Semiconductor Heterostructures Using X-ray Absorption Spectroscopy. https://doi.org/10.1021/acs.jpclett.2c02704
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Chakraborty S; Mandal P; Viswanatha R; Photoluminescence Quenching in CsPbCl3 upon Fe Doping: Colloidal Synthesis, Structural and Optical Properties. https://doi.org/10.1002/asia.202200478
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Andrea Camellini; Haiguang Zhao; Sergio Brovelli; Viswanatha R; Alberto Vomiero; Margherita Zavelani-Rossi; https://doi.org/10.1149/MA2022-01201104mtgabs
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Mannar S; Mandal P; Roy A; Viswanatha R; Experimental Determination of the Molar Absorption Coefficient of Cesium Lead Halide Perovskite Quantum Dots https://doi.org/10.1021/acs.jpclett.2c01198
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Pradeep KR; Abinaya Elumalai; Viswanatha R; Effect of Electronic Structure on Delayed Fluorescence in Mn-Doped Perovskite Nanocrystals https://doi.org/10.1021/acs.jpcc.2c01705
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Avijit Saha; Kushagra Gahlot; Viswanatha R; Exciton Dynamics in Mn/Ni Dual-doped Semiconductor Quantum Dots https://doi.org/10.1002/cnma.202100457
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Avijit Saha; Gaurav Kumar; Santanu Pradhan; Gauttam Dash; Viswanatha R; Gerasimos Konstantatos; Visible-Blind ZnMgO Colloidal Quantum Dot Downconverters Expand Silicon CMOS Sensors Spectral Coverage into Ultraviolet and Enable UV-Band Discrimination https://doi.org/10.1002/adma.202109498
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Mondal P; Viswanatha R; Insights into the Oxidation State of Cu Dopants in II–VI Semiconductor Nanocrystals https://doi.org/10.1021/acs.jpclett.1c04076
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Jain P; Mazumder; Pradeep KR; Viswanatha R; Swapan K. Pati; Chandrabhas Narayana; Polaronic Signatures in Doped and Undoped Cesium Lead Halide Perovskite Nanocrystals through a Photoinduced Raman Mode https://doi.org/10.1021/acsami.1c20321
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Viswanatha R;Prashant V. Kamat; Anthony K. Cheetham; Tribute to D. D. Sarma https://doi.org/10.1021/acs.jpcc.1c06736
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Pradeep KR; Viswanatha R; Doped or not doped? Importance of the local structure of Mn (II) in Mn doped perovskite nanocrystals https://doi.org/10.1016/j.materresbull.2021.111374
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Mondal P; Sathiyamani S; Viswanatha R; Is the Lack of Orange Emission Infallible Proof of Unsuccessful Doping of Mn in Quantum Dots? https://doi.org/10.1021/acs.jpcc.1c00359
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Chakraborty S; Mannar S; Viswanatha R; Local Surface Plasmon-Assisted Metal Oxide Perovskite Heterostructure for Small Light Emitters. https://pubs.acs.org/doi/10.1021/acs.jpcc.1c03577
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Pradeep KR; Viswanatha R; Doped or not doped? Importance of the local structure of Mn (II) in Mn doped perovskite nanocrystals. https://doi.org/10.1016/j.materresbull.2021.111374
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Makkar M; Lakshay Dheer; Anjali Singh; Luca Moretti; Margherita Maiuri; Soumen Ghosh; Giulio Cerullo; Umesh V. Waghmare; Viswanatha R; Magneto-Optical Stark Effect in Fe-Doped CdS Nanocrystals. https://pubs.acs.org/doi/10.1021/acs.nanolett.1c00126
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Makkar M; Luca Moretti; Margherita Maiuri; Giulio Cerullo; Viswanatha R; Ultrafast electron-hole relaxation dynamics in CdS nanocrystals. https://doi.org/10.1088/2515-7639/abf546
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Grandhi, G.K.; Krishna, M; Mondal, P; Viswanatha, R; Cation co-doping into ZnS quantum dots: towards visible light sensing applications. Bull. Mater. Sci 43, 301 (2020)
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Makkar, M; Goutam, P; Viswanatha, R; Crystal Facet Engineering of CoPt Quantum Dots for Diverse Colloidal Heterostructures, J. Phys. Chem. Lett., 11 (16), 6742-6748 (2020)
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Mondal, P; Chakraborty, S; Grandhi, G.K.; Viswanatha, R; Copper Doping in II–VI Semiconductor Nanocrystals: Single-Particle Fluorescence Study, J. Phys. Chem. Lett., 11, 13, 5367–5372 (2020)
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Mandal, P; Roy, A; Mannar, S; Viswanatha, R; Growth mechanistic insights into perovskite nanocrystals: dimensional growth, Nanoscale Adv., 2, 5305-5311 (2020)
