CORE FACULTY

Rudra Pratap

Rudra Pratap

Associate Professor

Room No: SF 12
Email: pratap@iisc.ac.in
Phone: +91 – 080 22933250
FAX: 080 23608659
Group Webpage: http://www.cense.iisc.ac.in/rp/
Associated Departments: Department of Mechanical Engineering

Education
• PhD, 1993, Cornell University, Ithaca, NY, USA.
• MS, 1987, University of Arizona, Tucson, USA.
• BTech (Hons), 1985, I.I.T. Kharagpur, India.

Experience
• Professor, IISc., Bangalore, 2008 – Present.
• Associate Professor, IISc, Bangalore, 2002 – 2008.
• Assistant Professor, IISc, Bangalore, 1996 – 2002.
• Lecturer, Cornell University, USA, 1994 – 1996.

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

Research Area
MEMS/ NEMS, MEMS and NEMS sensors, vibratory mechanobiology, Materials for MEMS/ NEMS, Fundamental research in NEMS/MEMS

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

• R. Melamud, B. Kim, M. Hopcroft, S. A. Chandorkar, M. Agarwal and T. W. Kenny, “Composite mechanical transducers and approaches therefor”, US 2007/0277620 A1, Dec 6, 2007

• R. Melamud, B. Kim, M. Hopcroft, S. A. Chandorkar, M. Agarwal and T. W. Kenny, “Composite mechanical transducers and approaches therefor”, US 2010/7806586 A1, Oct 5, 2010

• S. A. Chandorkar, Y. K. Liu, P. Warner, M. Penchev, T. Malahat and K. Chakravorty, “Charge accumulation mitigation by surface energy modification”, Intel Trade Secret, Dec 2014 ,

• R. Melamud, B. Kim, M. Hopcroft, S. A. Chandorkar, M. Agarwal and T. W. Kenny, “Composite mechanical transducers and approaches therefor”, US 2007/0277620 A1, Dec 6, 2007

• R. Melamud, B. Kim, M. Hopcroft, S. A. Chandorkar, M. Agarwal and T. W. Kenny, “Composite mechanical transducers and approaches therefor”, US 2010/7806586 A1, Oct 5, 2010

• S. A. Chandorkar, Y. K. Liu, P. Warner, M. Penchev, T. Malahat and K. Chakravorty, “Charge accumulation mitigation by surface energy modification”, Intel Trade Secret, Dec 2014 and Frequency Control, Vol.: 67, Issue: 4, pp 801-809, DOI: 10.1109/TUFFC.2019.2956463, 2020.

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. Ravishankar

• 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