Contemporary Impedance Sensors: Extraordinary Performance Boost by Cross-pollination Between Electronics and Mathematics
Abstract
Diagnostics of viral infections from breath, outdoor and indoor air quality, industrial safety, homeland security – are some examples of unmet gas monitoring needs. These and other application scenarios push the limits of existing detection concepts where we may reach their fundamental performance limits. This talk will stimulate your senses by (1) posing fundamental questions on principles of gas sensing and (2) by demonstrating on how modern multidisciplinary research addresses these questions by building sensors with previously unthinkable capabilities.
We will present new sensor-design criteria that allow high sensor stability and multi-gas detection with individual sensors. We will analyze our approach to boost performance of the most popular gas sensors – semiconducting metal oxide (SMOX) chemiresistors. Our simple excitation scheme based on contemporary electronics brought highly desired features such as linear sensor response (R2 > 0.99), dynamic range of six decades of gas concentrations, 50-fold improvement in the limit of detection, and cancelled effects from ambient temperature over - 25 to 50 oC. We lab-tested our excitation scheme with numerous volatiles and did field validations in wireless sensor network, drone-based, and wearable formats. We will conclude with a perspective for future needs and with the 2050 roadmap for ubiquitous gas monitoring.
Short Biography
Radislav A. Potyrailo is a Principal Scientist at GE Global Research. He has an Optoelectronics degree from Kiev Polytechnic Institute (1985) and PhD in Analytical Chemistry from Indiana University (1998). At GE Radislav has been directing numerous programs in the areas of design and excitation of physical transducers, materials with multi-response mechanisms to ambient environments, univariate and multivariate data analytics, and system engineering of microanalytical instrumentation. His focus is to bring innovative sensing systems with previously unavailable performance capabilities from laboratory feasibility studies to field validation and to commercialization. Radislav has been serving as a Principal Investigator on US Government programs funded by AFRL, DARPA, DHS, NETL, NIH, NIOSH, and TSWG. Some of the results Radislav summarized in 130+ granted US Patents and 150+ publications. Radislav serves as an editor of the Springer-Nature book series Integrated Analytical Systems, he is the North America Regional Chair of International Society for Olfaction and Chemical Sensing and Chair of the Device Working Group of the MEMS and Sensors Industry Group. His recent recognitions include SPIE Fellow for achievements in fundamental breakthroughs in optical sensing and analytical systems and Prism Award by Photonics Media/SPIE.