|Title||Wireless Hazard Badges to Detect Nerve-Agent Simulants|
|Publication Type||Journal Article|
|Year of Publication||2016|
|Authors||Zhu, R, Azzarelli, JM, Swager, TM|
|Journal||Angewandte Chemie International Edition|
|Pagination||9662 - 9666|
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.