Development of Selective Chemocapacitive Sensor Arrays for Chemical Warfare Agents
발표자
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초록
내용
Single-walled carbon nanotubes (SWCNTs) were functionalized with molecular receptors for selective detection of chemical warfare agents (CWAs). Covalently functionalization using a diazonium reaction and non-covalently spin-coated polymer receptors on the surface of the SWCNTs were investigated toward specific sensing of nerve agents (G and V), choking, and blister agents as well as a pesticide. Especially, the modified SWCNTs were fabricated with AC dielectrophoresis for the reproducibility, selectivity, and sensitivity in addition for portable applications. We also fabricated into sensor arrays for the selective detection of 6 different CWAs and using the principal component analysis the differentiation of each target CWAs were available. Importantly, the real nerve agent VX was tested on the fabricated sensors coated with polymer receptor, which showed the detection limit of 100 ppb, confirming that our sensors are suitable for practical applications.