Due to its unique properties such as high surface area and acoustic/viscoelastic properties electrospun nanofiber is also receiving great research interest in sensor application [10-16]. High surface area is one of the most desired parameters for the sensitivity of conductimetric sensor film. The operating principle of these devices is associated primarily with the adsorption of the gas molecules on the surface of semiconducting oxides inducing electric charge transport between the two materials that changes the resistance of the oxide. The structure configuration of the metal oxide materials is one of the key parameters controlling the gas-sensing process. Now there is an increasing trend in chemical sensing to utilize nanostructured materials as gas sensing elements because the high surface areas and the unique structure features are expected to promote the sensitivity of the metal oxide to the gaseous component.
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