Yin Weijie, Sun Jingye, Zhang Yang, Zhang Ying, Li Shasha, Zhu Mingqiang, Hong Hao, Ba Yutao, Deng Tao
School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing Jiaotong University, Beijing, Beijing, 100044, CHINA.
School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing, Beijing, CHINA.
Nanotechnology. 2020 Sep 29. doi: 10.1088/1361-6528/abbca8.
Abstract：A novel three-dimensional (3D) microtubular NOFET sensor has been fabricated from the two-dimensional (2D) reduced graphene oxide (rGO) nanosheets decorated with Ag nanoparticles, by applying the self-roll up technique. The electrical properties of 2D and 3D FET Ag NPs/rGO sensors have been investigated and compared. Finally, the performance of the 3D sensors has been demonstrated, where the preliminary results shown that our 3D FET Ag NPs/rGO NOsensor exhibit a relative fast response (response time of 116 s) to 20 part per million (ppm) NOwith a response of 4.92 % at room temperature at zero bias voltage and 2 V source-drain bias voltage. Moreover, the characteristics of our 3D FET Ag NPs/rGO sensors, e.g. response, response and recovery times have been demonstrated to be tuned by adjusting the applied source-drain and gate biases. Compared to 2D geometry, our 3D geometry occupied less device area, but with the same sensing area. This study would provide a new way to optimize sensing devices performance, and promote its developments for miniaturized and integrated gas sensing applications for indoor health and safety detections, outdoor environmental monitoring, industrial pollution monitoring and beyond.
通过应用自卷技术，由装饰有银纳米颗粒的二维还原氧化石墨烯（rGO）纳米片制备了一种新型的三维（3D）微管NOFET传感器。研究并比较了二维和三维场效应晶体管Ag NPs/rGO传感器的电学性质。最后，展示了三维传感器的性能，初步结果表明，我们的三维场效应晶体管Ag NPs/rGO NO传感器在室温、零偏置电压和2V源漏偏置电压下，对20ppm的NO表现出相对快速的响应（响应时间为116秒），响应率为4.92%。此外，已证明通过调整施加的源漏和栅极偏置，可以调节我们的三维场效应晶体管Ag NPs/rGO传感器的特性，如响应、响应和恢复时间。与二维几何结构相比，我们的三维几何结构占用的器件面积更小，但传感面积相同。这项研究将为优化传感设备性能提供一种新方法，并推动其在室内健康与安全检测、室外环境监测、工业污染监测等小型化和集成气体传感应用方面的发展。
