Low-Power, Non-Invasive Physiological Sensors for Remote Usage. Phase 1
Final rept. 30 Mar-29 Sep 1996
NANOMATERIALS RESEARCH CORP TUCSON AZ
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Oxygen sensors based on oxygen-conducting ceramics have the advantage of simplicity in construction and operation. However, currently available oxygen sensors of this kind require too high temperatures above 600 0C to operate. During Phase I, Nanomaterials Research Corporation NRC aimed to established the proof-of-concept for developing low-temperature, low power consuming, miniaturized oxygen sensors based on YSB materials. The objectives of the Phase I work included fabricating an oxygen sensor based on YSB nanomaterials, characterizing the sensor components the electrolyte and the electrodes, testing the sensor, and developing the conceptual basis for a systematic development and optimization work during Phase II. During Phase 1, we have studied basic dependence of properties on material, processing, and microstructure of the sensor components, and have identified electrode kinetics as a major performance-limiting factor. Then we have focused on significantly improving the sensor performance by introducing nanostructured composite electrodes. The nanostructured sensors have been evaluated extensively. Phase I results suggest that NRCs nanostructured sensors outperform the base line sensors, and that nanostructured materials are excellent foundation for electrode and electrolyte processing for the sensor applications.
- Physical Chemistry