Abstract
This paper reports on the fiber optic gas sensing characteristics of clad-modified Cu-doped ZnO nanopowder for the detection of ammonia, ethanol, methanol and acetone gases at various concentration (0–500 ppm). Pure and Cu-doped (1, 3 and 5 mol%) ZnO samples were fabricated and characterized for its structural, optical and morphological properties. Among the samples studied, the sensor containing 5 mol % Cu shows very good response to acetone with the highest gas sensitivity when compared with other gases. Moreover, it exhibits fast response/recovery time (12 and 15 s) and good selectivity.
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