Wireless Hazard Badges to Detect Nerve-Agent Simulants

• Main Authors: Zhu, Rong (Contributor), Azzarelli, Joseph M. (Contributor), Swager, Timothy M (Contributor)
• Other Authors: Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies (Contributor), Massachusetts Institute of Technology. Department of Chemistry (Contributor)
• Format: Article
• Language: English
• Published: Wiley Blackwell, 2018-03-23T19:34:04Z.
• Subjects: Article
• Online Access: Get fulltext

 Human exposure to hazardous chemicals can have adverse short- and long-term health effects. In this Communication, we have developed a single-use wearable hazard badge that dosimetrically detects diethylchlorophosphate (DCP), a model organophosphorous cholinesterase inhibitor simulant. Improved chemically actuated resonant devices (CARDs) are fabricated in a single step and unambiguously relate changes in chemiresistance to a wireless readout. To provide selective and readily manufacturable sensor elements for this platform, we developed an ionic-liquid-mediated single walled carbon nanotube based chemidosimetric scheme with DCP limits of detection of 28 ppb. As a practical demonstration, an 8 h workday time weighted average equivalent exposure of 10 ppb DCP effects an irreversible change in smartphone readout. Keywords: carbon nanotubes; dosimeter; ionic liquids; nerve agents; sensors