Laboratory scientists have designed a new chemical detector that uses a pair of commercially manufactured sensor arrays packaged inside a flow cell, exposing both arrays to a common air stream. Each array integrates four rectangular piezoresistive microcantilevers. Six of these microcantilevers (three per side) are coated with six different polymer (plastic) formulations. When gas-phase molecules land on the cantilevers, they diffuse into the polymer, changing its physical and chemical properties.
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