Viologen polymer-coated impedance sensors for midrange humidity levels and other volatile organic compounds

Journal Article · Sun Jan 31 23:00:00 EST 1999 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.1391683· OSTI ID:328218

Pfeifer, K B; Hughes, R C; Jenkins, M W ^[1]; Schneider, T W ^[2]

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1. Sandia National Labs., Albuquerque, NM (United States)
2. Science Applications International Corporation, Rockville, MD (United States)

The authors have demonstrated a sensor based on an interdigitated electrode platform coated with a conductive viologen polymer that has excellent moisture sensitivity, response time, and low power consumption. Work has been done to explain the limits of sensitivity and characterize the response of the sensor in low-humidity environments and also characterize the response of the device to various organic interferents such as alcohols and organophosphonates. Using lumped-circuit models, the nature of the response is explained and design parameters are isolated that will allow future performance improvements. In addition, the temperature dependence of moisture sensitivity is presented.

• Research Organization: Sandia National Laboratory
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 328218
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 2 Vol. 146; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
EXPERIMENTAL DATA
HUMIDITY
MONITORS
ORGANIC COMPOUNDS
PERFORMANCE
RESPONSE FUNCTIONS
SENSITIVITY
SPACE HVAC SYSTEMS