Metal Oxide Nanocolumns for Extremely Sensitive Gas Sensors
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초록
Highly ordered SnO2 and NiO nanocolumns have been successfully achieved by glancing-angle deposition (GLAD) using an electron beam evaporator. Nanocolumnar SnO2 and NiO sensors exhibited high performance owing to the porous nanostructural effect with the formation of a double Schottky junction and high surface-to-volume ratios. When all gas sensors were exposed to various gases such as C2H5OH, C6H6, and CH3COCH3, the response of the highly ordered SnO2 nanocolumn were over 50 times higher than that of the SnO2 thin film. This work will bring broad interest and create a strong impact in many different fields owing to its particularly simple and reliable fabrication process.
Abstract
Highly ordered SnO2 and NiO nanocolumns have been successfully achieved by glancing-angle deposition (GLAD) using an electron beam evaporator. Nanocolumnar SnO2 and NiO sensors exhibited high performance owing to the porous nanostructural effect with the formation of a double Schottky junction and high surface-to-volume ratios. When all gas sensors were exposed to various gases such as C2H5OH, C6H6, and CH3COCH3, the response of the highly ordered SnO2 nanocolumn were over 50 times higher than that of the SnO2 thin film. This work will bring broad interest and create a strong impact in many different fields owing to its particularly simple and reliable fabrication process.
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