Abstract
As a typical failure characteristic gas dissolved in transformer oil, C2H2 has a great significance to evaluate the running state of transformer by monitoring its content. Previous reports mainly focus on organizing WO3 nanoscale building blocks into well-defined 3D nanostructures. However, little attention has been paid to different 1D building blocks on the impact of gas sensing properties. In this work, nanorod and nanowire-assembled WO3 porous networks were controllably synthesized, which were applied to C2H2 detection. In comparison, sensor based on the latter exhibited superior performance than the former one, which seems indicate the significance of electronic transport in gas sensing process. It is proposed that the former possesses numerous nanojunctions between nanorods, while the latter has features with larger capping area and less junction density.
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