中文摘要：

通过气喷工艺在石英晶体微天平（QCM）上制备了基于还原氧化石墨烯（RGO）与聚氧化乙烯（PEO）两种材料的复合湿敏薄膜，对环境湿度进行检测。所得纯PEO薄膜及RGO-PEO复合薄膜的表面形貌以及化学特性分别通过扫描电子显微镜（SEM）以及紫外-可见光谱进行表征。与基于纯PEO薄膜的湿度传感器相比，基于RGO-PEO复合湿敏薄膜的湿度传感器的动态响应大大提高，其灵敏度从16.3Hz/%RH提升到34.7Hz/%RH。此外，基于复合薄膜的湿度传感器拥有更快的响应/恢复时间，达到传感器吸附/脱附时总频移的63.2%所用时间分别为3s和4s，而纯PEO薄膜为10s和12s；湿滞为1.21%RH，且有较好的长期稳定性。这项研究揭示了基于RGO-PEO复合薄膜的QCM湿度传感器在常温下检测环境湿度的发展潜力。

英文摘要：

A reduced graphene oxide(RGO)-polyethylene oxide(PEO)composite film was constructed on quartz crystal microbalance(QCM)by air spraying with composite and bilayer film structures for ambient humidity detection.The morphology and chemical properties of the fabricated pure PEO film and RGO-PEO composite materials were characterized by SEM and UV-Vis spectroscopy.The addition of RGO into PEO film contributes to a remarkable enhancement in dynamic response and sensitivity(34.7Hz/%RH)compared with the pure PEO film(16.3Hz/%RH).Furthermore,RGO-PEO composite film based sensor holds rapid response and recovery rates(3s and4s@63.2%respectively),which is better than those of pure PEO based sensor(10s and12s@63.2%respectively),negative hysteresis(1.21%RH)and excellent long term stability.This research reveals the promising potential of RGO-PEO composite film based QCM sensors in the humidity detection at room temperature.