In this talk, I will talk about development of MEMS piezoeresistivecantilever based Volatile Organic Compound (VOC) sensor in IIT Bombay. The talk will mainly focus on activities in past 6 months and future directions for these kinds of sensors. I will talk about some design optimization within the constraints of use of existing masks and future developments using topology optimization. I will go over the fabrication and characterization of these MEMS sensors, the circuit design for detecting change in resistance and software based identification of detected species. I will also describe development of novel paper based sensors for similar sensing applications. I will, finally, touch upon temperature compensation required for isolating the signal induced by surface stresses. I will then talk about design of new types of cantilever based sensors based on photonic crystal waveguides for detecting species landing on cantilever based sensors. Next, I will talk about development of photopatternable piezoelectric composites and their application for energy harvesting and for sensing applications. This novel work led to further extension of the AMAT project and a patent is being written up for the same. Finally, I will talk about some of my recent work in Stanford University. This research has led to 3 conference papers and a journal paper over past 2 months of work. In particular, I will talk about new research in understanding thermoelastic dissipation, temperature dependence of various energy loss mechanisms and topology optimization.
Dr. Saurabh A. Chandorkar received his BTech from IIT Bombay and Ph.D. in Mechanical Engineering with a minor in Electrical Engineering from Stanford University. Having being awarded Graduate Engineering Fellowship from Stanford University, he completed his PhD in Mechanical Engineering with a minor in Electrical Engineering from Stanford University in 2009. His dissertation entitled "Energy Loss Mechanisms in Micromechanical Resonators" focused specifically on the study of thermoelastic dissipation and the Akhieser effect in micromechanical resonators. He has published over 21 journal and 33 conference papers and holds 2 patents in the field of micromechanical resonators. He worked as a postdoctoral fellow in the area of adaptive Nanoimprint lithography in the Electrical Engineering Department of Stanford University. He worked in a R&D group in Intel Mask Organization for almost six years. His work at Intel involved building complete production worthy systems for upcoming technologies starting from research at concept level to actual implementation of all the mechanical, electronics and software aspects of the system. He has been awarded two Intel Logic Technology Development (LTD). For the past 6 months, he has worked with students in IIT Bombay and guided them in their research projects and PhD endeavors. He also resumed research in Stanford University in the past two months.