Visual indicator for trace organic volatiles.
We describe herein a novel approach for visual indication of trace organic vapors. The sensor utilizes a microporous material within a visual thin film transducer to produce changes in color upon exposure to a very wide range of volatile organic compounds. Visual indication at 5 parts per million (ppm) is demonstrated, with optoelectronic detection achieved to below 50 parts per billion (ppb). Through a thoughtful design of the sensor, we are able to avoid interference from water vapor, a critical attribute needed for practical application.
Rakow
Neal A
NA
3M Company, 3M Center, Building 235-2B-87, St. Paul, Minnesota 55144, USA.
Wendland
Michael S
MS
Trend
John E
JE
Poirier
Richard J
RJ
Paolucci
Dora M
DM
Maki
Stephen P
SP
Lyons
Christopher S
CS
Swierczek
Mary J
MJ