Abstract This paper suggests a novel humidity sensor based on graphene oxide sensing film supported by TiO2 nanorods which are grown between Au electrodes via hydrothermal method. The supported structure allows water molecules to pass through TiO2 nanorods and spread to the lower surface of the sensing film, which increases the utilization of the lower surface of graphene oxide (GO) film for humidity detection. Hence, water molecules can diffuse rapidly on both sides of GO film, which will assist in reducing the response time of the sensor. The SEM morphology characterization shows that the supported structure is feasible, and the response curve proves that the response speed of the humidity sensor is improved. The complex impedance spectra (CIS) results are utilized to analyse the response characteristics of the sensor at low humidity level.

中文翻译：

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基于由 TiO2 纳米棒支撑的氧化石墨烯薄膜的快速响应湿度传感器

摘要 本文提出了一种基于氧化石墨烯传感薄膜的新型湿度传感器，该薄膜由通过水热法生长在 Au 电极之间的 TiO2 纳米棒支撑。支撑结构允许水分子穿过TiO2纳米棒并扩散到传感膜的下表面，这增加了氧化石墨烯（GO）膜下表面用于湿度检测的利用率。因此，水分子可以在 GO 膜的两侧快速扩散，这将有助于减少传感器的响应时间。SEM形貌表征表明支撑结构是可行的，响应曲线证明湿度传感器的响应速度有所提高。复阻抗谱 (CIS) 结果用于分析传感器在低湿度水平下的响应特性。