Room temperature ZnO nanowire UV sensors by spray-coating

ZnO nanowires are often used for UV sensing, however in order to obtain high performance a complicated multistep process for preparation together with high measurement temperatures are used. In this work we demonstrate a facile one-step spray-coating method for the preparation of UV sensors based on ZnO tetrapod (ZnO-T) structure, demonstrating both high response (on/off) and fast rise-decay times at room temperature. Such UV sensors could be in principle deposited on any substrates; therefore this method could be used for flexible UV sensor preparation.