Electrochemical Multiphase Microreactor as Fast, Selective, and Portable Chemical Sensor of Trace Toxic Vapors

Author

Oh, Ilwhan ; Monty, Chelsea N. ; Masel, Richard I.

Author_Institution

Dept. of Chem. & Biomol. Eng., Univ. of Illinois at Urbana-Champaign, Urbana, IL

Volume

8

Issue

5

fYear

2008

fDate

5/1/2008 12:00:00 AM

Firstpage

522

Lastpage

526

Abstract

A novel type of gas chemical sensor is fabricated by combining microfabrication techniques and electrochemical transducer. The microchannel sensor we built is composed of liquid/gas microchannels separated by a nanoporous membrane. When oxime chemistry is adapted into it, the microchannel sensor gives response of hundreds of mV to trace vapor (10 ppb) of acetylcholine simulant within s. Double microchannel design further reduces potential drift and simplifies the sensor setup.

Keywords

electrochemical sensors; gas sensors; microreactors; microsensors; acetylcholine simulant; electrochemical multiphase microreactor; electrochemical transducer; gas chemical sensor; liquid-gas microchannels; microchannel sensor; microfabrication techniques; nanoporous membrane; oxime chemistry; portable chemical sensor; trace toxic vapors; Biomembranes; Biosensors; Chemical and biological sensors; Chemical sensors; Chemistry; Fabrication; Gas detectors; Hazardous materials; Microchannel; Nanoporous materials; Electrochemical gas sensor; multiphase microreactor; organophosphate;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2008.918682

Filename

4529149