Ultra-high sensitivity, multi-parameter monitoring of dynamical gas parameters using a reduced graphene oxide microcavity

作者：Xing, Fei; Yang, Yong^*; Shen, Junfeng; Jiang, Wenshuai; Liu, Zhibo; Zhu, Siwei; Yuan, Xiaocong^*

来源：Sensors and Actuators B: Chemical , 2016, 235: 474-480.

DOI：10.1016/j.snb.2016.05.100

• Graphene
• Reduced graphene oxide
• Microcavity integrated
• Total internal reflection
• Ultrasensitive gas sensing
• Multi-parameter gas sensing

An ultra-high sensitivity, multi-parameter monitoring system was established based on a 1.8 mm(3), high-temperature-reduced graphene oxide microcavity. The gas refractive index, pressure, velocity and flux can be detected in real time based on polarization-sensitive absorption of graphene, and the detection limits are 1.1 x 10(-8) RIU (refractive index units), 3.5 Pa, 3.5 mm/s, and 0.1 ml/min respectively, with an experimental response time less than 0.5 s. These results are a great improvement over those measured previously with single-parameter sensors. Furthermore, the system can also recognize gas flow direction accurately, and enable applications for extreme conditions and for precision instruments with microcavity integrated.

• 出版日期2016-11-1
• 单位天津市人民医院; 深圳大学; 西南交通大学; 南开大学