Typical XRD pattern of the ZnO wirelike film. The diffraction peaks can be indexed according to the hexagonal wurtzite structure of ZnO.
(a) Top-view and (b) cross-sectional SEM micrographs of the ZnO wirelike film.
Resistance response curves of the ZnO wirelike film sensor (a) for various gas concentrations in dry air at operating temperatures of (solid line) and (dashed line) and (b) for a concentration of at several operating temperatures.
Variation of the sensitivity for the ZnO wirelike film (a) as a function of operating temperature at exposure in dry air and (b) as a function of gas concentration at three different operating temperatures of 200, 250, and .
Variations of the response time with gas concentration for the ZnO wirelike film at various operating temperatures of 200, 250, and .
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