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Rudra Pratap

Research Interests

  • Inertial, acoustic and ultrasonic MEMS transducers
  • Piezo-MEMS and energy harvesting
  • Mechanobiology of micro and nanoscale natural (insect) transducers
  • Nanoscale patterning and material transport using electromigration

Publications

  • Randhir Kumar, Sudhanshu Tiwari, Varun Thakur, and Rudra Pratap, "Growth of Ultrafast, Super Dense ZnO Nanorods Using Microwaves for Piezoelectric MEMS Applications", Materials Chemistry and Physics, (Accepted for publication)
  • Sudhanshu Tiwari, Randhir Kumar, Saurabh Arun Chandorkar, and Rudra Pratap, “Fully Differential Actuation and Sensing in Piezoelectric a Resonators for High Signal to Background Resonant Sensing”, Journal of Microelectromechanical Systems, DOI: 10.1109/JMEMS.2020.3001246, June 2020.
  • Meera Vikas Garud and Rudra Pratap, “A Novel MEMS Speaker With Peripheral Electrostatic Actuation”, Journal of Microelectromechanical Systems, DOI: 10.1109/JMEMS.2020.3003463, June 2020.
  • M. Sharma, P. Kumar, A. V. Irzhak, S. Kumar, R. Pratap, S. V. von Gratovski, V. G. Shavrov & V. V. Koledov, “Melting and Electromigration in Thin Chromium Films”, Physics of the Solid State, Vol. 62, pp 988992, 2020.
  • Ajay Dangi; Christopher Y. Cheng; Sumit Agrawal; Sudhanshu Tiwari; Gaurav Ramesh Datta; Robert R. Benoit; Rudra  Pratap;  Susan  Trolier-Mckinstry;  Sri-Rajasekhar  Kothapalli,  “A  Photoacoustic Imaging Device Using Piezoelectric Micromachined Ultrasound Transducers (PMUTs)”, IEEE Trans- actions on Ultrasonics, Ferroelectrics, and Frequency Control, Vol.: 67, Issue: 4, pp 801-809, DOI: 10.1109/TUFFC.2019.2956463, 2020.
  • Amruta Ranjan Behera; Habibuddin Shaik; G. Mohan  Rao;  Rudra  Pratap,  “A  Technique  for  Estimation of Residual Stress and Young’s Modulus of Compressively Stressed Thin Films Using Microfab- ricated Beams”, Journal of Microelectromechanical Systems, DOI: 10.1109/JMEMS.2019.2948016, 28 October, 2019.
  • Kaustav Roy, Harshvardhan Gupta, Vijayendra Shastri, Ajay Dangi, Anthony Jeyaseelan, Soma Dutta, and Rudra Pratap, “Fluid Density Sensing using Piezoelectric Micromachined Ultrasound Transduc- ers”, IEEE Sensors Journal, DOI: 10.1109/JSEN.2019.2936469, August, 2019.
  • Krishna Balasubramanian, Tathagatha Biswas, Priyadarshini Ghosh, Swathi Suran, Abhishek Mishra, Rohan Mishra, Ritesh Sachan, Manish Jain, Manoj Varma, Rudra Pratap, and Srinivasan Raghavan, “Reversible Defect Engineering in Graphene Grain Boundaries”, Nature Communications, DOI:10.1038/s41467- 019-09000-8, March 6, 2019.
  • Christopher Cheng; Ajay Dangi; Liqiang Ren; Sudhanshu Tiwari; Robert  Benoit;  Yongqiang  Qiu; Holly S. Lay; Sumit Agrawal; Rudra Pratap; Sri-Rajaesekhar Kothapalli; Thomas Mallouk; Sandy Cochran;  Susan Trolier-McKinstry,  “Thin Film PZT-Based PMUT Arrays for Deterministic Parti  cle Manipulation”, IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, DOI: 10.1109/TUFFC.2019.2926211, 2019.
  • Jayaprakash Reddy and Rudra Pratap, “Design, fabrication and on-the-die characterization  of  a MEMS tuning-fork gyroscope, ISSS Journal of Micro and Smart Systems, Vol. 7, Issue 2, pp 87-96, October 2018.
  • Nadur L. Naveena, Rudra Pratap, T. R. Ravikumar Naik, S. A. Shivashankar, “Microwave assisted greener synthesis of silver nanoparticles using Karanjin and their antifungal properties, Journal of Material NanoScience, Vol. 5(1), pp 23-28, 2018.
  • A. R. Behera, A. Dangi, and R. Pratap, “An Experimental Study of Residual Stress Induced Modulation of Vibration Characteristics in 1-D MEMS Resonators”, ASTM Material Performance and Characterization, DOI: 10.1520/MPC20170156, 2018.
  • Rammohan Sriramdas and Rudra Pratap, “Performance Analysis of Hybrid Vibrational Energy Harvesters with Experimental Verification, Smart Materials and Structures, Vol. 27, 075008, 2018.
  • Rammohan Sriramdas and Rudra Pratap, “An Experimentally Validated Lumped Circuit Model for Piezoelectric and Electrodynamic Hybrid Harvesters”, IEEE Sensors Journal, Vol. 18, Issue 6, pp 2377–7384, DOI: 10.1109/JSEN.2017.2776242, March 2018.
  • P. Krishna Menon, Jagannath Nayak, Rudra Pratap, “Sensitivity Analysis of an In-plane MEMS Vibratory Gyroscope”, Microsystem Technologies, Vol. 24, pp 2199-2213, DOI: 10.1001/s00542-017- 3666-4, 2018.
  • Subhajit Kundu, Sriramdas Rammohan, Kazi Rafsanjani Amin, Aveek Bid, Rudra Pratap and Narayanan Ravishankar, “Crumpled Sheets of Reduced Graphene Oxide as a Highly Sensitive, Robust and Versatile Strain Sensor”, Nanoscale, Issue 27, 2017.
  • Ajay Dangi and Rudra Pratap, “System level modeling and design maps of PMUTs with residual stresses”, Sensors & Actuators: A. Physical, Vol. 262, pp 18-28, August 2017.
  • Sumit Kumar, Praveen Kumar and Rudra Pratap,  “A  model for electromigration induced flow in  liquid metals, Journal of Applied Physics D: Applied Physics, Vol. 50, 39LT02, 2017.
  • Rammohan Sriramdas and Rudra Pratap, “Scaling and Performance Analysis of MEMS Piezoelectric Energy Harvesters”, Journal of Microelectromechanical Systems, Vol. 26, Issue 3, pp 679–690, doi: 10.1109/JMEMS.2017.2689326, 2017.
  • Jayaprakash Reddy and Rudra Pratap, “Si-gold-glass hybrid wafer bond for 3-D MEMS and wafer level packaging”, Journal of Micromechanics and Microengineering, Vol. 27, 015005, doi: 10.1088/0960- 1317/27/1/015005, 2017.

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Patents

Patents Granted-7                                   Patents Pending-8

  • Patent No. 205188, Date: 22/3/2007
    Title: A MEMS based electrostatic acoustic transducer and method of sensing sound pressure.
    Organization: Indian Institute of Science and Cranes Software International Limited.
    Inventors: Dr. Rudra Pratap and Shishir Kumar.

  • Patent No. US 2011/0023632 A1, Date: 3/2/2011
    Title: A sub-threshold elastic deflection FET sensor for sensing pressure/force, a method and system thereof.
    Organization: Indian Institute of Science
    Inventors: Charanjeet Malhi Kaur, Navakanta Bhat, Rudra Pratap.

  • Patent No. US 2011/0050201 A1, Date: 3/3/2011
    Title: A sub-threshold forced plate FET sensor for sensing inertial displacements, a method and system thereof.
    Organization: Indian Institute of Science
    Inventors: Thejas, Navakanta Bhat, Rudra Pratap.

  • Patent No. 20110031986 A1, Date: 10/2/2011
    Title: A sub-threshold CAPFET sensor for sensing analyte, a method and system thereof.
    Organization: Indian Institute of Science
    Inventors: Balaji Jayaramana, Navakanta Bhat, Rudra Pratap, Shivashankar S A.

  • Title: A Pheromone Detector
    Indian Patent Number: 307528, Date: 17/10/2014
    Organization: Indian Institute of Science
    Inventors: Santanu Bhattacharya, Rudra Pratap, Parikshit Moitra, Deepa Bhagat.

  • Title: Optical Nanosensor for Early Stage Detection of Bactocera Oleae Infestation
    Indian Patent Number: 316092, Date: 16/07/2019
    Organization: Indian Institute of Science
    Inventors: Santanu Bhattacharya, Rudra Pratap, Parikshit Moitra, Deepa Bhagat.

  • Title: Sensors based on crumpled sheets of reduced Graphene oxide and a method thereof
    Indian Patent Application Number: 201641037892 A, Date: 31/08/2018
    Organization: Indian Institute of Science
    Inventors: Subhajit Kundu, S. Rammohan, Kazi Rafsanjani Amin, Avik Bid, Rudra Pratap, N. Rav- ishankar

  • Title: A Device To Determine Viscosity of a Fluid and a Method Thereof.
    Indian Patent Application Number: 202041024905, Date:13/06/2020
    Organization: Indian Institute of Science
    Inventors: Sudhanshu Tiwari, Rudra Pratap.

  • Title: An Electrochemical Lithography Tool for High Throughput Pattern Generation
    Indian Patent Application Number: 202041016120, Date:14/04/2020
    Organization: Indian Institute of Science
    Inventors: Sumit Kumar, Ebinesh Abraham, Praveen Kumar, Rudra Pratap.

  • Title: Process for microfabricating micoelectromechanical systems devices
    Indian Patent Application Number: 201841025729, Date:10/07/2018
    Organization: Indian Institute of Science
    Inventors: Jayaprakash Reddy, Rudra Pratap.

  • Title: A Micro-Scale actuator
    Indian Patent Application Number: 201741020853
    Organization: Indian Institute of Science
    Inventors: J.P. Reddy, R. Pratap, M. M. Nayak, P. P. Mohanlal, Joji J. Chaman, Pradeep K.

  • Title: MEMS Speaker
    Indian Patent Application Number: 201741010624
    Organization: Indian Institute of Science
    Inventors: Vamsy Godthi, Jayaprakash Reddy, Rudra Pratap

  • Title: Method and Apparatus for Detecting Muscular Disorders Based on Vibration Signature of Muscle Cells
    Indian Patent Application Number: 4161/CHE/2015
    Organization: Indian Institute of Science
    Inventors: Venkatesh K. P. R., Mohan Jayaram, Upendra Nongthomba, Rudra Pratap.

  •  Title: A system and method for pattern generation on a substrate by electromigration.
    Indian Patent Application Number: 5652/CHE/2013
    Organization: Indian Institute of Science
    Inventors: Santanu Talukder, Praveen Kumar, Rudra Pratap.

  • Title: Enhancement of sensitivity of metallic piezoresistor using controlled electromigration. Indian Patent Application Number: 3730/CHE/2010
    Organization: Indian Institute of Science
    Inventors: Mohanasundaram, Arindam Ghosh, Rudra Pratap

Conference and Seminars

  • Ajay Dangi; Kaustav Roy; Sumit Agrawal; Haoyang Chen; Anuj Ashok; Christopher Wible; Mohamed Osman; Rudra Pratap; Sri-Rajasekhar Kothapalli, “A modular approach to neonatal whole-brain photoacoustic imaging”, Proceedings Volume 11240,  Photons  Plus  Ultrasound:  Imaging  and  Sens- ing 2019; SPIE BiOS, 2020, San Francisco, California, United  States,  doi.org/10.1117/12.2546854, 1124057, 2020.
  • Sudhanshu Tiwari; Randhir Kumar; P. Krishna Menon; Jeyaseelan A Antony; Soma Dutta;  Rudra Pratap; “On the Realization of Self-Sensing Piezoelectric MEMS Actuators”, 2019 International Con- ference on Manipulation, Automation and Robotics at Small Scales (MARSS), Helsinki, Finland, DOI: 10.1109/MARSS.2019.8860944, 19045968, 2019.
  • Ajay Dangi, Sumit Agrawal, Sudhanshu Tiwari, Shubham Jadhav, Christopher Cheng, Gaurav Ramesh Datta, Susan Troiler-McKinstry, Rudra Pratap, Sri-Rajasekhar Kothapalli, “Ring PMUT array based miniaturized photoacoustic endoscopy device”, Proceedings Volume 10878, Photons Plus Ultrasound: Imaging and Sensing 2019; SPIE BiOS, 2019, San Francisco, USA, doi.org/10.1117/12.2510000, 1087811, 2019.
  • Maneesha Sharma; Sumit Kumar; Rudra Pratap; Artemy Irzhak; Praveen Kumar; Svetlana von Gratowski; Victor Koledov; Peter Lega; Vladimir Shavrov; “Electric Current Driven Formation of Micro-and Nano-sized Beads in Thin Cr Films”, 2019 IEEE International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO), Zhenjiang, China, DOI: 10.1109/3M- NANO46308.2019.8947369, 19278219, 2019.
  • Murugappan Ramanathan; Rudra Pratap; “Integration of a Compliant Thermal Actuator for Unlatch- ing in a MEMS Latch Accelerometer”, 2019 20th International Conference on Solid-State Sensors, Ac- tuators and Microsystems & Eurosensors XXXIII (TRANSDUCERS & EUROSENSORS XXXIII), Berlin, Germany, DOI: 10.1109/TRANSDUCERS.2019.8808459, 18940092, 2019.
  • Praveen Kumar; Rudra Pratap; Santanu Talukder; Sumit Kumar; Vijayendra Shastri; Raman Maurya; Swamy K.B. Mruthyunjaya; “Patterning Cr Film by Passing Electric Current through a Traversing Pointy Stylus: Introduction to Electrolithography and Its Prospects”, 2018 IEEE International Con- ference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO), Hangzhou, China, DOI: 10.1109/3M-NANO.2018.8552166, 18305168, 2018.
  • Praveen Kumar; Victor Koledov; Svetlana von Gratowski; Rudra Pratap; Artemy Irzhak; Alexey Zhikharev; Andrey Orlov; Peter Lega; Santanu Talukder; Sumit Kumar; Vijayendra Shashtri; “Elec- trical Jointing at Microand  Nanoscale  by  Electromigration  and  Mechanical  Nano-Manipulation  for Bottom-Up Nano-Assembling”, 2018 IEEE International Conference on Manipulation, Manu- facturing and Measurement on the Nanoscale (3M-NANO), Hangzhou, China, DOI: 10.1109/3M- NANO.2018.8552248, 18305142, 2018.
  • Murugappan Ramanathan; Rudra Pratap; “Energy Based Design And Validation of Latch MEMS g- Switch”, 2018 4th IEEE International Conference on Emerging Electronics (ICEE), Bangalore, India, DOI: 10.1109/ICEE44586.2018.8937948, 19228935, 2018.
  • Sumit Kumar; Ebinesh Abraham; Santanu Talukder; Praveen Kumar; Rudra Pratap; “Micro Elec- trolithography System Development”, 2018 4th IEEE International Conference on Emerging Electron- ics (ICEE), Bangalore, India, DOI: 10.1109/ICEE44586.2018.8937922, 19228915, 2018.
  • Shubham Jadhav; Babusha Singh;  Saurabh Chandorkar;  Rudra Pratap;  “Optimization of platinum  thin film as a bottom electrode for aluminum nitride thin films using Plackett-Burman statistical approach”, 2018 4th IEEE International Conference on Emerging Electronics (ICEE), Bangalore, India, DOI: 10.1109/ICEE44586.2018.8937951, 19256723, 2018.
  • Amruta Ranjan Behera; Habibuddin Shaik; G. Mohan Rao; Rudra Pratap; “Experimental Investigation of Dynamic Characteristics of Metal Coated Buckled Micro-Beams with Electrothermal Modula- tion of Residual Stress”, 2018 4th IEEE International Conference on Emerging Electronics (ICEE), Bangalore, India, DOI: 10.1109/ICEE44586.2018.8937895, 19228910, 2018.
  • Sudhanshu Tiwari; Randhir Kumar; Ajay Dangi; Rudra Pratap; “Enabling Fabrication of PZT Based PiezoMEMS Devices”, 2018 IEEE SENSORS, New Delhi, India, DOI: 10.1109/ICSENS.2018.8589565, 18365894, 2018.
  • Ajay Dangi; Sumit Agrawal; Sudhanshu Tiwari; Shubham Jadhav; Christopher Cheng; Susan Trolier- McKinstry; Rudra Pratap; Sri-Rajasekhar Kothapalli; “Evaluation of High Frequency Piezoelectric Micromachined Ultrasound Transducers for Photoacoustic Imaging”, 2018 IEEE SENSORS, New Delhi, India, DOI: 10.1109/ICSENS.2018.8589733, 18329586, 2018.
  • Viphretuo Mere; Aneesh Dash; Rakshitha Kallega; Rudra Pratap; Akshay Naik; Shankar Kumar Sel- varaja; “Silicon Photonics Based On-Chip Cantilever Vibration Measurement”, 2018 IEEE SENSORS, New Delhi, India, DOI: 10.1109/ICSENS.2018.8589808, 18329500, 2018.
  • Kaustav Roy; Harshvardhan Gupta; Vijayendra Shastri; Ajay Dangi; Rudra Pratap; “Fluid Density Sensing Using PMUTs”, 2018 IEEE SENSORS, New Delhi, India, DOI: 10.1109/ICSENS.2018.8589662, 18329600, 2018.
  • Amruta Ranjan Behera; Rudra Pratap;  “On the Threshold of Stress Invariant  Second Mode Excitation in Buckled MEMS Resonators”, 2018 IEEE SENSORS, New Delhi, India, DOI: 10.1109/IC- SENS.2018.8589902, 18365948, 2018.
  • Meera Garud; Harshvardhan Gupta; Rudra Pratap; “Live Demonstration: Singing Photo Frame”, 2018 IEEE SENSORS, New Delhi, India, DOI: 10.1109/ICSENS.2018.8589874, 18381698, 2018.
  • Sudhanshu Tiwari, Ajay Dangi, and Rudra Pratap, “Development of piezo-mems process flow with PZT thin films”, 10th Annual International Workshop on Advanced Materials, Ras Al Khaimah, UAE February 18-20, 2018.
  • Randhir Kumar and Rudra Pratap, “Ultra-fast, highly oriented, and stress free ZnO thin film growth by microwave assisted hydro-thermal method”, 10th Annual International Workshop on Advanced Materials, Ras Al Khaimah, UAE February 18-20, 2018.
  • Rudra Pratap, “Probing the world with micro and nano resonators”, NanoS-E3 Conference and Work- shop, (keynote talk), September 27-29, 2017, Brisbane, Australia.

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