基于层层组装石墨烯/半导体氧化物复合薄膜的室温气体传感器研究

Compared with the traditional semiconductor oxide gas sensor, the graphene-based gas sensor has many advantages such as easy operation, easy integration, high safety and low power consumption, and has drawn wide attention in the field of gas sensors. However, its low sensitivity to target gas and its long response time limit its further application. The design of material structure to improve the gas adsorption and desorption efficiency is a necessary means to develop high performance graphene based sensors. In this project, graphene/semiconductor oxide (G/MOx) composite thin film is prepared by electrostatic induction layer-by-layer assembly technology, which combines the sensing characteristics of graphene and semiconductor oxide and solves the increase of surface energy, the reduction of the specific surface area caused by the small size effect of nanomaterials to obtain high sensitivity at room temperature, fast response gas sensing material. Through the study, we ultimately build a gas sensor based on the composite film, in order to achieve a high practical Graphene-based gas sensors with valuable performance and provide a scientific basis.

石墨烯基气体传感器相对于传统半导体氧化物气体传感器具有室温工作、易于集成、安全性高、低功耗等众多优点在气体传感器领域受到广泛关注。然而其对目标气体灵敏度较低、响应恢复时间长的问题限制了其进一步应用，对其进行材料结构设计从而提升气体吸附及脱附效率是开发高性能石墨烯基传感器的必要手段。本项目拟采用静电诱导层层组装技术制备石墨烯/半导体氧化物（G/MOx）复合薄膜，在结合石墨烯及半导体氧化物气体传感特性的同时，解决纳米材料小尺寸效应引起表面能升高、粒子团聚导致的比表面积下降的难题，获得室温条件下高灵敏度，快响应的气体传感材料，通过开展该项研究，最终构建基于该复合薄膜的气体传感器，为实现具有实用价值的高性能石墨烯基气体传感器提供科学依据。

石墨烯基气体传感器相对于传统半导体氧化物气体传感器具有室温工作、易于集成、安全性高、低功耗等众多优点在气体传感器领域受到广泛关注。本项目已采用静电诱导层层组装技术制备石墨烯/半导体氧化物（G/MOx）复合薄膜，在结合石墨烯及半导体氧化物气体传感特性的同时，解决纳米材料小尺寸效应引起表面能升高、粒子团聚导致的比表面积下降的难题，获得室温条件下高灵敏度，快响应的气体传感材料，通过开展该项研究，最终构建基于该复合薄膜的气体传感器，为实现具有实用价值的高性能石墨烯基气体传感器提供科学依据。