A portable electronic nose system with chemiresistor sensors to detect and distinguish chemical warfare agents

Wang, L.C.; Tang, Kea Tiong; Kuo, Chun‐Yan; Ho, Cheng-Long; Lin, Shunshun; Sung, Youngje; Chang, Chih-Hao

doi:10.1109/nanomed.2009.5559065

Cited by 6 publications

(1 citation statement)

References 17 publications

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“…In other methods such as piezoelectric sensors, PEO was utilized for the detection of organophosphorus compounds in the vapor phase . Wang et al studied about chemiresistor sensors to detect CWAs with various polymer coatings, including PEO derivatives . This research may prove the possibility of the application of PEOs to many CWA sensors.…”

Section: Resultsmentioning

confidence: 99%

Single-Walled Carbon-Nanotube-Based Chemocapacitive Sensors with Molecular Receptors for Selective Detection of Chemical Warfare Agents

Song

Cho

et al. 2018

ACS Appl. Nano Mater.

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Single-walled carbon nanotubes (SWCNTs) were fabricated using AC dielectrophoresis into chemocapacitive sensors, and molecular receptors were applied for the selective detection of several chemical warfare agents (CWAs). The selective responses toward nerve simulants (G and V), choking and blister agents as well as a pesticide were investigated with specific receptor molecules that were either covalently functionalized or noncovalently coated onto the surfaces of the SWCNTs. The SWCNT-based chemocapacitive sensors showed reproducibility and sensitivity to 200 ppb for several target molecules. The fabricated sensor arrays were assessed for the selective detection of six different CWAs, and the principal component analysis demonstrated their specificity. VX, a real nerve agent, was tested on the fabricated SWCNT-based chemocapacitive sensor coated with a thiourea-functionalized siloxane polymer, and the successful detection of VX at 100 ppb confirmed that our SWCNT-based sensors are suitable for practical applications.

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Section: Resultsmentioning

confidence: 99%