Ordered ZnO nanorods synthesized by combustion chemical vapor deposition

Aligned single-crystal ZnO rod arrays with diameters ranging from 50 nm to 300 nm and length up to 10 microm have been synthesized on silicon substrate under open-air conditions using a combustion chemical vapor deposition (CVD) method. The ZnO rods grew in the direction of (0001) with six [1120] peripheral surface planes. A single ZnO rod solid-state gas sensor fabricated on an interdigitated electrode pattern demonstrated prompt response to ethanol vapor at 400 degrees C.