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Chemical Microsensor Development for Aerospace ApplicationsNumerous aerospace applications, including low-false-alarm fire detection, environmental monitoring, fuel leak detection, and engine emission monitoring, would benefit greatly from robust and low weight, cost, and power consumption chemical microsensors. NASA Glenn Research Center has been working to develop a variety of chemical microsensors with these attributes to address the aforementioned applications. Chemical microsensors using different material platforms and sensing mechanisms have been produced. Approaches using electrochemical cells, resistors, and Schottky diode platforms, combined with nano-based materials, high temperature solid electrolytes, and room temperature polymer electrolytes have been realized to enable different types of microsensors. By understanding the application needs and chemical gas species to be detected, sensing materials and unique microfabrication processes were selected and applied. The chemical microsensors were designed utilizing simple structures and the least number of microfabrication processes possible, while maintaining high yield and low cost. In this presentation, an overview of carbon dioxide (CO2), oxygen (O2), and hydrogen/hydrocarbons (H2/CxHy) microsensors and their fabrication, testing results, and applications will be described. Particular challenges associated with improving the H2/CxHy microsensor contact wire-bonding pad will be discussed. These microsensors represent our research approach and serve as major tools as we expand our sensor development toolbox. Our ultimate goal is to develop robust chemical microsensor systems for aerospace and commercial applications.
Document ID
20140006583
Acquisition Source
Glenn Research Center
Document Type
Presentation
Authors
Xu, Jennifer C. (NASA Glenn Research Center Cleveland, OH United States)
Hunter, Gary W. (NASA Glenn Research Center Cleveland, OH United States)
Lukco, Dorothy (Vantage Partners, LLC Brook Park, OH, United States)
Chen, Liangyu (Ohio Aerospace Inst. Brook Park, OH, United States)
Biaggi-Labiosa, Azlin M. (NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
June 3, 2014
Publication Date
May 13, 2013
Subject Category
Inorganic, Organic And Physical Chemistry
Aeronautics (General)
Report/Patent Number
GRC-E-DAA-TN9305
Meeting Information
Meeting: International Instrumentation Symposium and MFPT 2013
Location: Cleveland, OH
Country: United States
Start Date: May 13, 2013
End Date: May 17, 2013
Funding Number(s)
CONTRACT_GRANT: NNC07BA13B
WBS: WBS 284848.02.04.03.02
CONTRACT_GRANT: NNC12BA01B
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
hydrogen sensors
fuel leak detection
chemial sensors
gas detection
Fire detection

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