Nitrophenol detection using suspended SWNT films for environmental monitoring

Suspended addressable SWNT film arrays between cantilever electrodes were successfully developed for environmental monitoring. Structurally suspended SWNT films from substrate floor made possible rapid and highly sensitive detection of target molecules with increased convectional and diffusional fluxes of the molecules and with a large binding surface area. SWNT film FET resulted in a real-time, label-free, and electrical detection of nitrophenol to the concentration of ca. 1μM with a step-wise rapid response time of several seconds.