An amperometric nitric oxide sensor with fast response and ppb-level concentration detection relevant to asthma monitoring
2015 (English)In: Sensors and actuators. B, Chemical, ISSN 0925-4005, Vol. 209, 639-644 p.Article in journal (Refereed) Published
A MEMS-based amperometric nitric oxide (NO) gas sensor is reported in this paper. The sensor is designed to detect NO gas for the purpose of asthma monitoring. The unique property of this sensor lies in the combination of a microporous high-surface area electrode that is coated with Nafion (TM), together with a liquid electrolyte. The sensor is able to detect gas concentrations of the order of parts-per-billion (ppb) and has a measured NO sensitivity of 0.045 nA/ppb and an operating range between 25 and 65% relative humidity. The settling time of the sensor is measured to 8s. The selectivity to interfering gases such as ammonia (NH3) and carbon monoxide (CO) was high when placing an activated carbon fiber filter above the sensor. The ppb-level detection capability of this sensor combined with its relatively fast response, high selectivity to CO and NH3 makes the sensor potentially applicable in gas monitoring for asthma detection.
Place, publisher, year, edition, pages
2015. Vol. 209, 639-644 p.
Nitric oxide, Amperometric, Nafion (TM), MEMS, Gas sensor
Chemical Sciences Medical Laboratory and Measurements Technologies
IdentifiersURN: urn:nbn:se:kth:diva-161090DOI: 10.1016/j.snb.2014.11.147ISI: 000349082200084ScopusID: 2-s2.0-84919800404OAI: oai:DiVA.org:kth-161090DiVA: diva2:797838
FunderVINNOVAEU, European Research Council, 267528
QC 201503252015-03-252015-03-092015-09-07Bibliographically approved