Wearable Ultralow Power Personal Exposure Monitor for Atmospheric Pollutants

DESCRIPTION provided by applicant The goal of this STTR Phase I collaboration between KWJ Engineering KWJ and North Carolina State University NCSU will be development of a unique autonomously powered wearable environmental gas sensor for personal exposure monitoring PEM The approach will be to integrate KWJ ultralow power high performance printed amperometric gas sensor for key atmospheric pollutants including carbon monoxide CO ozone O and nitrogen dioxide NO with thermoelectric power harvesting technology under development at NCSU This integration will provide a new tool for personal and personalized exposure assessment This program addresses the NIEHS mission to discover how the environment affects people in order to promote healthier lives and specifically the identified need for tools for improved exposure assessment The wearable sensors with on board power harvesting will derive all required power from body heat via a small thermoelectric generator TEG and associated electronic components incorporated into a lightweight unobtrusive wearable system Very small lightweight unobtrusive monitoring systems will broaden the conditions under which exposure studies can be performed and will remove the need for awkward bulky or inconvenient sampling collection devices and batteries This system will expand the scope of PEM studies and provide increased capability to produce personalized data from mobile individuals thus improving the ability of federal agencies to protect human health and well being relative to environmental inhalation hazards KWJandapos s new class of amperometric gas sensor the screen printed electrochemical sensor SPEC promises to deliver high performance gas sensing for a wide range of applications at commodity level prices These devices which are about the size of a micro SD cell phone card use a variety of conventional and developmental electrolytes tuned for specific tasks as well as novel detection electrode catalysts This provides unprecedented access to a wide range of tunable selectivity sensitivity and robustness to environmental conditions compared to conventional amperometric gas sensors This is a new cost competitive high performance technology that bridges the cost performance gap for gas measurement applications The Phase I program will involve fabrication and testing of SPEC devices using components down selected for effective sensing of the target gases at relevant environmental levels These components will then be integrated into a demonstration using thermoelectric power sources in a body worn system Additional target gases and particulates criteria pollutants are envisions as add ons to the system in Phase II

PUBLIC HEALTH RELEVANCE A new next generation personal exposure monitoring technology based on ultralow power high performance gas sensors and thermoelectric self powered operation by body heat energy harvesting will be developed The wearable system will provide new capabilities for personal exposure assessment of toxic atmospheric pollutants and will provide a new route to personalized exposure monitoring for the improvement of health