Review Article
Piezoelectric Nanowires in Energy Harvesting Applications
Figure 14
The active H2 sensors based on ZnO VINGs. ((a)–(e)) The schematic diagram of the synthesis process and working mechanism of the sensor. (f) A photograph of the as-fabricated sensor. (g) The output voltage of the sensor with exposure to different concentration of hydrogen gas. (h) The linear relationship between the hydrogen concentration and output voltage. (Reproduced from [16] with the permission from Elsevier.)
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