Selective detection of NO2and C2H5OH using a Co3O4-decorated ZnO nanowire network sensorElectronic supplementary information (ESI) available: Details of experimental procedures and gas sensing characteristics. See DOI: 10.1039/c0cc05256f.

The selective detection of two different gases, NO2and C2H5OH, has been achieved using a p-type Co3O4-decorated n-type ZnO nanowire (NW) network sensor. The gas selectivity was explained by the catalytic effect of nanocrystalline Co3O4and the extension of the electron depletion layer viathe formation of p–n junctions. [ABSTRACT FROM AUTHOR]