概述：一种均匀氧化石墨烯薄膜的加工技术，能够实现高精度、高稳定性的湿度传感器。
技术进步推动了对湿度传感器的需求，但是加工出均匀、高精度、可靠性高、低成本的传感器仍存在一定的难度。中国浙江大学Jin Xie和他的团队现已开发出一种利用表面张力技术加工均匀厚度的氧化石墨烯（GO）薄膜的方法，可以用作传感器上的湿度传感材料。在测试中，应用了这种材料的传感器表现出了高灵敏度（测量相对湿度范围从10％到90％），以及对不断变化条件的快速响应时间。另外，改变GO溶液的浓度可产生不同厚度的薄膜。该技术可以进一步开发以适用于医疗、农业、消费电子行业等。
A technique that creates uniform films of graphene oxide enables the production of humidity sensors with high accuracy and stability. Technological advancement is fueling a demand for humidity sensors, but reliably producing uniform, high accuracy sensors at a low cost is still a challenge. Jin Xie and his team from China’s Zhejiang University have now developed a surface tension method to create uniform-thickness films of graphene oxide (GO), a humidity sensing material, which can then be transferred to sensor platforms. In tests, the resulting sensors showed high sensitivity from 10% to 90% relative humidity and quick response times to changing conditions. Altering the concentration of GO solutions produces films of varying thickness. This technique may be further developed for use in applications ranging from medical, to agriculture, to consumer electronics.
Related paper:Surface acoustic wave humidity sensors based on uniform and thickness controllable graphene oxide thin films formed by surface tension
Microsystems & Nanoengineering5, Article number: 36 ()
doi:10.1038/s41378-019-0075-0
