Travan Caterina, Bergmann Alexander
Infineon Technology AG, 85579 Neubiberg, Germany.
Institute of Electronic Sensor Systems, Technische Universität Graz, 8010 Graz, Austria.
Sensors (Basel). 2019 Aug 1;19(15):3379. doi: 10.3390/s19153379.
Graphene is a good candidate for filling the market requirements for cheap, high sensitivity, robust towards contamination, low noise, and low power consumption gas sensors, thanks to its unique properties, i.e., large surface, high mobility, and long-term stability. Inkjet printing is a cheap additive manufacturing method allowing fast, relatively precise and contactless deposition of a wide range of materials; it can be considered therefore the ideal technique for fast deposition of graphene films on thin substrates. In this paper, the sensitivity of graphene-based chemiresistor gas sensors, fabricated through inkjet printing, is investigated using different concentrations of graphene in the inks. Samples have been produced and characterized in terms of response towards humidity, nitrogen dioxide, and ammonia. The presented results highlight the importance of tuning the layer thickness and achieving good film homogeneity in order to maximize the sensitivity of the sensor.
由于石墨烯具有独特的性能，即大表面积、高迁移率和长期稳定性，它是满足廉价、高灵敏度、抗污染、低噪声和低功耗气体传感器市场需求的理想材料。喷墨打印是一种廉价的增材制造方法，能够快速、相对精确且非接触地沉积多种材料；因此，它可被视为在薄基板上快速沉积石墨烯薄膜的理想技术。在本文中，研究了通过喷墨打印制备的基于石墨烯的化学电阻式气体传感器的灵敏度，使用了不同浓度的石墨烯墨水。制备了样品，并对其对湿度、二氧化氮和氨的响应进行了表征。给出的结果突出了调整层厚度和实现良好薄膜均匀性对于最大化传感器灵敏度的重要性。
