Flexible Ammonia Sensor Based on PEDOT:PSS/Silver Nanowire Composite Film for Meat Freshness Monitoring

Flexible ammonia (NH 3 ) sensors were fabricated on polyethylene terephthalate substrate using poly(3, 4-ethylene-dioxythiophene): poly(styrenesulfonate) (PEDOT:PSS)/silver nanowire (AgNW) composite film as the active layer. With the AgNWs of optimized concentration being incorporated into the PEDOT...

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Bibliographic Details
Published in:IEEE electron device letters 2017-07, Vol.38 (7), p.975-978
Main Authors: Li, Siying, Chen, Sujie, Zhuo, Bengang, Li, Qiaofeng, Liu, Wenjiang, Guo, Xiaojun
Format: Article
Language:English
Subjects:
Ammonia sensor
composite film
Conductivity
Electrodes
meat freshness monitoring
Monitoring
PEDOT:PSS
Robot sensing systems
Sensitivity
silver nanowire
Substrates
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Summary:Flexible ammonia (NH 3 ) sensors were fabricated on polyethylene terephthalate substrate using poly(3, 4-ethylene-dioxythiophene): poly(styrenesulfonate) (PEDOT:PSS)/silver nanowire (AgNW) composite film as the active layer. With the AgNWs of optimized concentration being incorporated into the PEDOT:PSS film, the sensitivity of the devices was significantly improved. Even with simple digitally dispensed parallel structure electrodes, the device achieved excellent sensing performance, and was shown to be able to detect very low NH 3 concentration below 500 ppb. The mechanism for the sensing performance improvement was revealed. The sensor also showed considerable selectivity with respect to water and common organic vapors. Finally, the sensor was integrated with a self-designed portable data acquisition system to monitor the freshness of pork, demonstrating its feasibility for inspecting the meat quality in the early stage.
ISSN:0741-3106
1558-0563
DOI:10.1109/LED.2017.2701879