Gas sensors based on organic field-effect transistors (OFETs) may enable a broad range of monitoring applications. Growth of ultrathin and microstructured organic semiconductor film is an efficient way to realize high performance OFET-based sensors. On page 3419, Lifeng Chi, Klaus Müllen and co-workers demonstrate high performance OFET-based ammonia sensors with ultrathin (4-6 molecular layers) dendritic organic semiconductor microstripes prepared via dip-coating.
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