Faculty · Department of Electrical Engineering

Sudip Nag

Assistant Professor

Sudip Nag

Contact

Email:
sudipnag@ee.iitb.ac.in

Office:
+91 22 2576 7432

Address:
Room No. EE214A, Electrical Engineering Department, IIT Bombay, Powai, Mumbai-400076, Maharashtra, India

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Research Interests

AI Neural Implants Edge-Intelligence Flexible Electrodes FDA-compliant Medical Devices Point-of-Care Diagnostics Energy Harvesting Internet-of-Things

Qualifications

  • • Ph.D. (Best Thesis Award, IIT Bombay, 2014; University of Toronto, 2025)

Publications

Journals ▼
  • J.P. Olorocisimo, S. Nag, H. Zhang, S. Yang, M. Prytula, S. Liu, M. Kanchwala, Y Sun, J. Zariffa, and R. Genov, “Temporal Interference Stimulation of Peripheral Nerves Induces Functionally Diverse Limb Movements Revealed by Automated Pose Estimation and Unsupervised Behavioral Analysis,” Springer Nature Journal of NeuroEngineering and Rehabilitation, vol 29, no. 23, pp. 1–16, 2026.
  • S. Nag, A. Remadevi, J. Che, M. Prytula, H. Xing, H. Xing, N. Kong, A. Constas-Malvanets, H. Zhang, Y. Sun, J. Olorocisimo, J. Zariffa, and R. Genov, “Energy-Efficient Adaptive Neural Stimulator with Waveform Prediction by Sub-Threshold Interrogation of the Electrode-Tissue Interface,” IEEE Transactions on Biomedical Circuits and Systems, vol. 19, no. 6, pp. 1142-1159, May 2025.
  • S. Acharyya, A. Ghosh, S. Nag, S.B. Majumder, and P.K. Guha, “Smart and Selective Gas Sensor System Empowered with Machine Learning Over IoT Platform,” IEEE Internet of Things Journal, vol. 11, no. 3, pp. 1–10, Feb. 2024.
  • J. Xu, J. S. Filho, S. Nag, L. Long, C. Tejeiro, E. Hwang, G. OLeary, Y. Huang, M. Kanchwala, M. Abdolrazaghi, C. Tang, P. Liu, Y. Sui, X. Liu, J. Zariffa, and R. Genov, “Fascicle-Selective Ultrasound-Powered Bidirectional Wireless Peripheral Nerve Interface IC,” IEEE Transactions on Biomedical Circuits and Systems, vol. 17, no. 6, pp. 1–10, Dec. 2023.
  • T. Bhowmick, S. Nag, and S.B. Majumder, “Investigations on lanthanum iron cobalt oxide thin film as selective carbon monoxide sensor,” Journal of Alloys and Compounds, vol. 884, pp. 1–10, Dec. 2021.
  • S. Acharyya, S. Nag, S. Kimbahune, A. Ghose, A. Pal, and P.K. Guha, “Selective Discrimination of VOCs Applying Gas Sensing Kinetic Analysis over a Metal Oxide-Based Chemiresistive Gas Sensor,” ACS Sensors, accepted for publication, 2021.
  • A. Banerjee, T. K. Bhattacharyya, and S. Nag, ”High Efficiency CMOS Active Rectifier with Adaptive Delay Compensation,” Elsevier Microelectronics Journal, vol. 112, no. 105052, pp. 1-11, Jun. 2021.
  • S. Acharyya, S. Nag, and P. K. Guha, ”Selective Detection of VOCs With WO3 Nanoplates-Based Single Chemiresistive Sensor Device Using Machine Learning Algorithms,” IEEE Sensors Journal, vol. 21, no. 5, pp. 5771–5778, 2021.
  • T. Bhowmick, S. Nag, S. B. Majumder, ”Understanding the ethanol and acetone sensing behaviour of CuO thin films through elements of gas diffusion theory,” Elsevier Materials Chemistry and Physics, vol. 262, no. 124286, pp. 1–12, April 2021.
  • S. Acharyya, B. Jana, S. Nag, G. Saha, and P. K. Guha, ”Single resistive sensor for selective detection of multiple VOCs employing SnO2 hollowspheres and machine learning algorithm: A proof of concept,” Elsevier Sensors and Actuators B: Chemical, vol. 321, no. 128484, pp. 1–11, Jun. 2020.
  • S. Nag, A. Koruprolu, S. M. Saikh, R. Erfani, and P. Mohseni, ”Auto-Resonant Tuning for Capacitive Power and Data Telemetry Using Flexible Patches,” IEEE TCAS-II Express Briefs, vol. 67, no. 10, pp. 1804–1808, Oct. 2020.
  • R. Erfani, F. Marefat, S. Nag, and P. Mohseni, ”A 1–10MHz Frequency-Aware CMOS Active Rectifier with Dual-Loop Adaptive Delay Compensation and ¿230mW Output Power for Capacitively Powered Biomedical Implants,” accepted for publication, IEEE Journal of Solid State Circuits, 2019.
  • R. Veerubhotla, D. Das, and S. Nag, ”Internet of Things Temperature Sensor Powered by Bacterial Fuel Cells on Paper,” Elsevier Journal of Power Sources, vol. 438, no. 226947, pp. 1–9, Oct. 2019. [Also, refer to the corrigendum J. Power Sources 438 (2019) 226947]
  • S. Nag and N. V. Thakor, ”Implantable Neurotechnologies: Electrical Stimulation and Applications,” Springer Medical and Biological Engineering and Computing, vol. 54, no. 1, pp. 63–76, Jan. 2016.
  • I. Lahiri, I. M. Delgado, S. Sheshadri, K. A. Ng, S. Nag, S. C. Yen, and N. V. Thakor, ”Selforganization of fibro-axonal composite tissue around unmodified metallic micro-fluidic electrodes can form a functioning interface with a peripheral nerve: A new direction for creating long-term neural interfaces,” Muscle Nerve, vol. 53, no. 5, pp. 789–796, May 2016.
  • H. U. Lee, S. Nag, A. Blasiak, Y. Jin, N. V. Thakor, and I. H. Yang, ”Subcellular Optogenetic Stimulation for Activity- Dependent Myelination of Axons in a Novel Microfluidic Compartmentalized Platform,” ACS Chemical Neuroscience, vol. 7, pp. 1317–1324, Oct. 2016.
  • S. Nag, S. K. Sikdar, N. V. Thakor, V. R. Rao, and D. Sharma, ”Sensing of Stimulus Artifact Suppressed Signals from Electrode Interfaces,” IEEE Sensors Journal, vol. 15, no. 7, pp. 3734–3742, Jul. 2015.
  • R. Jegadeesan, S. Nag, K. Agarwal, N. V. Thakor, and Y. X. Guo, ”Enabling Wireless Powering and Telemetry for Peripheral Nerve Implants,” IEEE Journal of Biomedical Health Informatics, vol. 19, no. 3, pp. 958–970, May 2015.
  • S. Nag, X. Jia, N. V. Thakor, and D. Sharma, ”Flexible charge balanced stimulator with 5.6 fC accuracy for 140 nC injections,” IEEE Transactions on Biomedical Circuits and Systems, vol. 7, no. 3, pp. 266–275, Jun. 2013.
  • S. G. Surya, S. Nag, N. M. Duragkar, D. Agarwal, G. Chatterjee, S. Gandhi, S. Patil, D. K. Sharma, and V. R. Rao, ”Low power instrumentation system for nanoelectromechanical sensors for environmental and healthcare applications,” Journal of Low Power Electronics, vol. 8, pp. 1–7, 2012.
  • N. A. Gilda, S. Nag, S. Patil, M. S. Baghini, D. K. Sharma, and V. R. Rao, ”Current excitation method for ΔR measurement in piezo-resistive sensors with a 0.3 ppm resolution,” IEEE Transactions on Instrumentation and Measurement, vol. 61, no. 3, pp. 767–774, Mar. 2012.
  • V. Seena, N. S. Kale, S. Nag, M. Joshi, S. Mukherji, and V. R. Rao, ”Developing a polymeric microcantilever platform technology for biosensing applications,” International Journal of Micro and Nano Systems, vol. 1, no. 1, pp. 65–70, Jun. 2009.
  • N. S. Kale, S. Nag, R. Pinto, and V. R. Rao, ”Fabrication and characterization of a polymeric microcantilever with an encapsulated hotwire CVD polysilicon piezoresistor,” IEEE-ASME Journal of Microelectromechanical Systems, vol. 18, no. 1, pp. 79–87, Feb. 2009.
  • M. S. Baghini, S. Nag, R. Lal, and D. K. Sharma, ”An ultra low power CMOS instrumentation amplifier using current balancing technique for personal ECG recorders,” World-SciNet Journal of Circuits and Systems, vol. 17, no. 6, pp. 1053–1067, Dec. 2008.
Conferences ▼
  • J. Xu, M. Kanchwala, M. Abdolrazzaghi, H. Cai, Y. Huang, J. Ma, C. Lim, L. Xu, S. Gong, W. Deng, Q. Deng, J. Che, S. Nag, J. Olorocisimo, R. Singh, Y. Wang, J. S. Filho, M. Mohaved, H. Moradi, G. Eleftheriades, T. Valiante, and R. Genov, ”Event-Based Spatially Zooming Neural Interface IC with 10nW/Input Reconfigurable-Inverter Fabric and Input-Adaptive Quantization,” in Proc. IEEE ISSCC, pp. 1–2, Feb. 2025 (accepted).
  • J. Xu, J. S. Filho, E. Hwang, S. Nag, L. Long, M. Kanchwala, M. Abdolrazzaghi, Y. Huang, J. Zariffa, and R. Genov, ”Artificially-Intelligent Fascicle-Selective Bidirectional Peripheral Nerve Interfaces,” in Proc. IEEE BioCAS Conf., Canada, pp. 19–21, 2023.
  • J. Xu, J. S. Filho, S. Nag, L. Long, C. Tejeiro, E. Hwang, G. O’Leary, Y. Huang, M. Kanchwala, M. Abdolrazzaghi, C. Tang, P. Liu, Y. Sui, X. Liu, G. Eleftheriades, J. Zariffa, and R. Genov, ”Fascicle-Selective Bidirectional Peripheral Nerve Interface IC with 173dB FOM Noise-Shaping SAR ADCs and 1.38pJ/b Frequency-Multiplying Current-Ripple Radio Transmitter,” in Proc. IEEE ISSCC, pp. 1–2, Feb. 2023.
  • T. Karak, L. K. Tiwari, S. Sengupta, and S. Nag, ”Reference Trajectory Generation for Closed-Loop Control of Electrical Stimulation for Rehabilitation of Upper Limb,” in Proc. 21st IFAC World Congress, pp. 16438–16444, Jul. 2020.
  • S. Acharyya, B. Manna, S. Nag, and P. K. Guha, ”WO3 Nanoplates based Chemiresistive Sensor Device for Selective Detection of 2-Propanol,” in Proc. IEEE Sensors Conf., pp. 1–4, 2019.
  • A. Banerjee, T. K. Bhattacharyya, and S. Nag, ”A Smart Temperature Sensor and Controller for Bioelectronic Implants,” in Proc. IEEE Sensors Conf., India, pp. 1–4, 2018.
  • S. Acharyya, S. Dey, S. Nag, and P. K. Guha, ”ZnO cladded MnO2 based resistive sensor device for Formaldehyde sensing,” in Proc. IEEE Sensors Conf., India, pp. 1–4, 2018.
  • T. Bhowmick, S. Nag, and S. B. Majumder, ”Gas sensing characteristics in ZnO thin film explicated through the analysis of conductance transients and the concept of activation energy,” in Proc. IEEE Sensors, pp. 1–4, 2018.
  • A. Koruprolu, R. Erfani, P. Mohseni, and S. Nag, ”Capacitive Wireless Power and Data Transfer for Implantable Medical Devices,” in Proc. IEEE BioCAS Conf., USA, pp. 1–4, 2018.
  • L. J. Ong, S. C. Liu, D. S. W. Marshal, T. Sibindi, G. G. L. Gammad, C. W. Tsai, A. Rusly, C. Libedinsky, S. Nag, and S. C. Yen, ”A Fully Wireless Implantable Multi-Channel Muscle Stimulator with Closed-Loop Feedback Control,” in Proc. IEEE BioCAS Conf., pp. 1–4, 2018.
  • M. D. S. Wong, K. A. Ng, S. Nag, R. Jegadeesan, K. W. Leong, L. J. Ong, A. Rusly, M. Alam, G. G. L. Gammad, C. W. Tsai, S. C. Liu, K. Voges, N. V. Thakor, A. Lahiri, C. Libedinsky, Y. P. Xu, and S. C. Yen, ”A chronic implantable EMG recording system with wireless power and data transfer,” in Proc. IEEE BioCAS Conf., pp. 19–21, 2017.
  • S. Nag, P. Lee, R. Herikstad, J. Sng, S. C. Yen, and N. V. Thakor, ”Multi-function Optogenetic Stimulator and Neural Amplifier for Wirelessly Controlled Neural Interface,” in Proc. IEEE BioCAS Conf., pp. 1–4, 2015.
  • S. Nag, D. Sharma, and N. V. Thakor, ”Ultra-low power electrical stimulator for electrode interfaces,” in Proc. BioCAS Conf., pp. 488–491, 2014.
  • S. Nag, K. A. Ng, R. Jagadeesan, S. Sheshadri, I. D. Martinez, S. Bossi, S. C. Yen, and N. V. Thakor, ”Neural Prosthesis for Motor Function Restoration in Upper Limb Extremity,” in Proc. IEEE BioCAS Conf., pp. 388–391, 2014.
  • S. Nag, D. Sharma, and N. V. Thakor, ”24 Vpp compliant biphasic stimulator for inductively powered animal behavior studies,” in Proc. IEEE EMBC, Osaka, Japan, Jul. 2013, pp. 3242–3245.
  • S. Nag, N. Thakor, and D. Sharma, ”Accurately charge balanced stimulator with wireless power delivery,” in Proc. 1st International Conference on BioElectronics, BioSensors, BioMedical Devices, BioMEMS/NEMS and Applications, pp. 1–2, 2012.
  • S. Nag and D. Sharma, ”Wirelessly powered stimulator and recorder for neural interfaces,” in Proc. IEEE EMBC, pp. 5612–5616, 2011.
  • S. Nag, N. S. Kale, V. R. Rao, and D. K. Sharma, ”An ultra–sensitive delta-R/R measurement system for biochemical sensors using piezoresistive micro-cantilevers,” in Proc. IEEE EMBC, pp. 3794–3797, 2009.
  • S. Nag and D. K. Sharma, ”Wireless e-jacket for multi-parameter biophysical monitoring and telemedicine applications,” in Proc. 3rd IEEE International Summer School and Symposium on Medical Devices and Biosensors, pp. 40–44, 2006.
  • S. Nag and M. S. Baghini, ”Multi channel electrocardiogram using custom analog chip,” in Proc. PCEA IFToMM International Conference, pp. 1–4, 2006.
  • A. Blasiak, H. U. Lee, S. Nag, and I. H. Yang, ”Compartmentalized microfluidic platform integrated with subcellular electrical stimulation for studying activity-dependent axon myelination,” in Proc. International Conference on Optical MEMS and Nanophotonics, pp. 5.1–5.2, 2016.
  • K. A. Ng, A. Cutrone, S. Bossi, S. Nag, I. D. Martinez, S. Sheshadri, C. A. Poulard, Y. P. Xu, S. C. Yen, and N. V. Thakor, ”An intrafascicular electrode with integrated amplifiers for peripheral nerve recording,” in Proc. 7th International IEEE-EMBS Neural Engineering Conference, pp. 394–397, 2015.
  • S. Sheshadri, J. Kortelainen, S. Nag, K. A. Ng, F. A. Bazley, F. Michoud, A. Patil, J. Orellana, C. Libedinsky, A. Lahiri, L. Chan, K. Chng, A. Cutrone, S. Bossi, N. V. Thakor, I. D. Martinez, and S. C. Yen, ”Correlation between muscular and nerve signals responsible for hand grasping in non-human primates,” in Proc. IEEE EMBC, pp. 26–30, 2014.
  • R. Mandal, S. Nag, and N. V. Thakor, ”Wirelessly Powered and Controlled, Implantable, Multichannel, Multiwavelength Optogenetic Stimulator,” in Proc. IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications (IMWS-BIO), pp. 1–3, 2013.
  • V. Seena, S. Nag, S. Gandhi, D. Agarwal, G. Chatterjee, S. Patil, S. Mukherji, D. Sharma, and V. R. Rao, ”Low cost polymer nano-mechanical sensor systems for healthcare and homeland security applications,” in Proc. IEEE Global Interposer Technology Workshop, pp. 1–5, 2011.
  • S. G. Surya, S. Nag, A. J. Fernandes, S. Gandhi, D. Agarwal, G. Chatterjee, and V. R. Rao, ”Highly sensitive ΔR/R measurement system for nano-electro-mechanical cantilever based bio-sensors,” in Proc. IEEE International Symposium on Electronic System Design, pp. 34–38, 2011.
  • V. Seena, S. Nag, S. Patil, S. Mukherji, and V. R. Rao, ”An ultra-sensitive polymer composite microcantilever platform for explosive detection,” in Proc. 7th International Workshop on Nanomechanical Cantilever Sensors, pp. 1–4, 2010.
  • N. S. Kale, S. Nag, R. Pinto, and V. R. Rao, ”Photoplastic NEMS with an encapsulated polysilicon piezoresistor,” in Proc. 8th IEEE Conference on Nanotechnology, pp. 18–21, 2008.
  • V. Seena, N. Kale, S. Nag, M. Joshi, S. Mukherji, and V. R. Rao, ”Development of a polymeric microcantilever platform technology for biosensing applications,” in Proc. 5th International Conference on Smart Materials Structures and Systems, pp. 1–4, 2008.
Book Chapters ▼
  • A. Banerjee and S. Nag, ”Energy Efficient Electrical Stimulation Systems,” in Handbook of Neuroengineering, Springer, pp. 825-850, Feb. 2023.
  • S. Nag, D. Sharma, and N. V. Thakor, ”Electrical Stimulation,” Book chapter, Cambridge University Press, UK, ISBN: 9781107040830, Oct. 2015.
  • A. Blasiak, S. Nag, and I. H. Yang, ”Subcellular Optogenetic Stimulation Platform for Studying Activity-Dependent Axon Myelination In Vitro,” in Methods in Molecular Biology, Springer Human Press, pp. 207-224, 2018.
  • T. Bhowmick, V. Ambardekar, A. Ghosh, M. Dewan, P. P. Bandyopadhyay, S. Nag, and S. B. Majumder, ”Multilayered and Chemiresistive Thin and Thick Film Gas Sensors for Air Quality Monitoring,” in Multilayer Thin Films - Versatile Applications for Materials Engineering, IntechOpen, 2020.
Patent Applications ▼
  • S. Nag, D. Sharma, S. Jayaraman, and B. Purushothaman, ”Cardiac Devices,” Indian Patent Application No. 2874/MUM/2009, Dec. 2013.
  • S. Nag and D. Sharma, ”Ultra-low power charge balancing and low noise stimulator using adiabatic and self clocking techniques,” Indian Patent Application No. 3580/MUM/2012, Dec. 2012.
  • S. Nag, S. G. Surya, V. R. Rao, and D. Sharma, ”Voltage profile based biphasic constant current stimulator with artifact suppressor,” Indian Patent Application No. 2562/MUM/2012, Aug. 2012.
  • N. A. Gilda, S. Nag, D. Sharma, and V. R. Rao, ”AC current driven open-bridge configuration for measuring impedance variations of a sensor,” Indian Patent Application No. 2205/MUM/2011, Aug. 3, 2011.