All-in-one, multi-detection systems for extreme environments

This research focuses on developing advanced multiplexed-detection platforms for environmental monitoring in extreme conditions. Leveraging CMOS technology for manufacturing and improving sensor performance, we aim to overcome limitations such as sensitivity, detection range, and cost in traditional sensors. The study utilizes graphene and graphene nanoribbons, which have tunable properties, enabling scalable, high-performance electronic circuits for biological and chemical sensing, as well as the detection of rare molecules and transient chemical reactions. We successfully synthesized large-scale, high-quality graphene using chemical vapor deposition techniques and transferred it to silicon and transparent quartz substrates via the bubble transfer method. Our custom-built photolithography allowed for precise control of graphene structure and the fabrication of sensor arrays. Our graphene sensors show high performance (i.e., low resistance and high carrier mobility) and consistency. Ongoing investigations include electrical characterization, functionalization with various capture molecules, and assessing sensor performance, including sensitivity, selectivity, limit of detection, and detection time for target chemicals. This work was supported financially by the NASA EPSCoR Award.