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Visitor Seminar: “The potential applications of bio-inspired 3D electronic microfliers for environmental sensing”
May 2 @ 10:00 am - 11:00 am
Miniaturized, low-cost, wireless electronic devices with meteorological sensors can serve as Lagrangian tracers and provide complementary and important information for pollution sensing, environmental monitoring, storm observations, etc. We developed and examined passive structures designed for controlled, unpowered flight inspired by wind-dispersed seeds, combining fundamental studies in Lagrangian dynamics and novel soft electronics developed for biomedical applications. Controlled mechanical buckling techniques in assembly of three-dimensional (3D) mesostructures provide access to miniature, 3D fliers optimized for such purposes, in processes that align with the most sophisticated production techniques. Specifically, this talk describes a range of 3D macro-, meso- and microscale fliers produced in this manner, including those that incorporate active electronic for pollution sensing and colorimetric payloads for pH level sensing. Analytical and experimental studies, using a set of state-of-the-art techniques such as high-speed Particle Image Velocimetry (PIV) and 3D Particle Tracing Velocimetry (3D-PTV), of the aerodynamics of high-performance 3D structures establish controlled rotational kinematics and low terminal velocities. Additional examples of these new convergence concepts in fluid/solid (continuum) mechanics, soft electronics, and optical methods will be included for other potential applications.
Dr. Jin-Tae “Jimmy” Kim is a postdoctoral researcher in the Querrey Simpson Institute for Bioelectronics at Northwestern University. He obtained his B.S. degree in Mechanical Engineering, with minor in mathematics, from Oklahoma State University in 2013 and his MS and PhD degrees in Theoretical and Applied Mechanics from The University of Illinois at Urban-Champaign in 2015 and 2020, respectively. His areas of research are experimental/theoretical fluid mechanics via photogrammetric approaches and soft electronics. He has published 25 papers in peer-reviewed journals including Nature, Nature Electronics, Science Advances, PNAS, Journal of Fluid Mechanics, Physical Review Fluids, Physics of Fluid, among others. He received the Hassan Aref memorial award for Theoretical and Applied Mechanics in 2020.