Chem, Bio and Rad Sensor Development at NASA Ames Research Center

J. Li, J. Koehne, Y. Lu, J-W Han, M. Meyyappan
NASA Ames Research Center, US

Keywords: sensors

Summary:

We have been engaged in developing chem, bio and radiation sensors for mission needs for nearly a decade. The chemsensor, which is currently at TRL 5-6, consists of carbon nanotubes, its variations including dopings and functionalization, and other nano structures deposited on an interdigitated electrode platform. This electronic nose has been flight-tested as well as incorporated into smartphones for homeland security applications. The biosensor platform uses a nanoelectrode array as an affinity sensor with electrochemical impedance spectroscopy for the detection of various biomarkers related to crew health monitoring. Finally, the radiation sensor uses a FINFET structure with the oxide dielectric replaced by a radiation-responsive liquid gel as dielectric. An array of such FET devices with different gels capable of responding to different radiations can serve as a radiation nose. This talk will present detailed results demonstrating the functionalities of the above sensors, practical issues related to system development and extension of their utility to societal applications.