Functionalized organic semiconductor-based field-effect transistors for phosphonate vapor detection

In this talk, we report initial studies of p-type oligomer OFETs, with hydroxyl and phenol functionalized semiconductor blends serving as receptor layers, responding to the weakly basic analyte dimethyl methylphosphonate (DMMP) that simulates phosphonate nerve agents. The hydroxyl group is the simplest receptor that could be utilized for enhancing this interaction. At least one blend appears to be single-phase based on x-ray diffraction and electron microscopy.