Dr. Aman Satija Gives Seminar Over Development and Application of Laser Spectroscopy for Gas-Phase Diagnostics

Last Friday, Dr. Aman Satija gave a seminar over, “Development and Application of Laser Spectroscopy for Gas-Phase Diagnostics.” Dr. Satija is a Research Engineer at the Applied Laser Spectroscopy Lab at Purdue University.

Abstract: Laser diagnostics are employed in combustion and propulsion research due to their non-intrusiveness to the flow field, high-accuracy, and fast response time. Laser based techniques are used for measuring important flow parameters such as temperature, pressure, velocity and species concentration. Some laser methods, based on linear optical processes, such as absorption spectroscopy and particle image velocimetry have matured to an extent that they are commercially available and are being actively used in the industry. In this seminar, Dr. Satija will provide a survey of his research in quantitative non-linear spectroscopic methods and high-repetition rate diagnostics. He will: a) discuss the similarities and differences between various types of nanosecond coherent anti-Stokes Raman scattering (CARS) methods along with some applications b) present recent developments in chirped-probe-pulse femtosecond CARS for 5 kHz thermometry c) describe the principle of polarization spectroscopy and present its application towards measurement of minor species in reacting flows d) discuss progress of high-average power high-repetition lasers and present examples of high-repetition rate diagnostics in turbulent atmospheric and high- pressure combustion and e) comment on the challenges and opportunities of quantum modeling of nonlinear light-matter interaction in context of atoms and small molecules.

Bio: Aman Satija is currently a research engineer at the Applied Laser Spectroscopy Lab at Purdue University. His research interests include spectroscopy, photonics, combustion and fluid mechanics. His expertise is in the development of laser-based techniques and tools and their application to gas-phase environments. He has applied linear and non-linear spectroscopic techniques in a variety of applications including laminar flames, turbulent flames and plasmas. Aman received B.E in Mechanical Engineering from the Army Institute of Technology, Pune University in 2002, M. Sc. in Aerospace Engineering from Auburn University in 2007 and Ph. D. in Mechanical Engineering from Purdue University in 2013.

Dr. Zhengwei Li Gives Seminar Over Advanced Manufacturing of Emerging Bioinspired Systems: From 3D Curvy Electronics to Living Machines

On Wednesday, we heard from Dr. Zhengwei Li, a Postdoctoral Fellow for Bio-Integrated Electronics at Northwestern University. He gave a seminar over, “Advanced Manufacturing of Emerging Bioinspired Systems: From 3D Curvy Electronics to Living Machines.”

Abstract: Grand challenges facing human society in the 21st century mostly emerge at the interface between human and machines. To efficiently tackle these challenges, the development of future real-world technologies will depend strongly on our understanding of the principles underlying living systems and utilizing these capabilities in forward design of synthetic systems. In this talk, I will present our recent experimental and theoretical studies on emerging bioinspired systems including, Design and Manufacturing of, 1) Artificial Compound Eye Camera, 2) Arbitrary 3D Curvy Electronics, 3) Biohybrid Valveless Pump-bots and 4) Pump-bots with Flow Loop Feedback powered by engineered skeletal muscle. Underlying mechanics theories, design and fabrication approaches, potential biomedical applications, and the future of biohybrid designs will be discussed. The successful investigation of these systems will not only boost our capability in developing new materials, devices and robotics that possess unprecedented functions and capabilities, but also inspire new technology development for applications toward solving real world problems in health, medicine and robotics.

Bio: Dr. Zhengwei Li is currently a postdoctoral fellow, working with Prof. John A. Rogers in the Center for Bio-Integrated Electronics at Northwestern University, where he works on the wireless electronics manufacturing for healthcare applications. He also had previous postdoctoral research experience in biomanufacturing, working with Prof. Taher Saif in the Department of Mechanical Science and Engineering at University of Illinois at Urbana-Champaign. Dr. Li received his Ph.D. degree in Mechanical Engineering in May 2017 from University of Colorado Boulder, where he won the Outstanding Dissertation Award (one recipient each year across all different engineering disciplines). His primary research interests includes design and fabrication of biohybrid robotics (“Bio-bots”), 3D curvy electronics and soft functional materials.