Graphene oxide chemiresistive and semiconductor gas sensors for CO and VOC detection**

在这个项目中，我们将创造功能化的基于石墨烯-氧化物薄膜的交指型化学电阻和半导体气体传感器。我们将研究二维合成氧化石墨烯薄膜和膜功能化的新方法，用于室温下选择性气体检测。为了说明其商业用途，我们将对传感器进行实验室测试，同时进行芯片封装和原型封装。*工程设计挑战包括在定制的交叉型芯片上构图氧化石墨烯薄膜。石墨烯薄膜需要进行化学功能化，以便它能够检测到特定的气体或挥发性有机化合物。虽然有一些很好的参考配方提供了一个合理的起点，但需要了解最终用户的确切要求，以便在存在可检测到的目标气体水平的情况下，产生坚固的多模式传感器来可靠地检测警报条件。对于Grapehen-FET气体传感器的设计，我们将在交叉指源极和漏极上沉积薄膜石墨烯，在底栅-氧化石墨烯介质上沉积。为了使氧化石墨烯对目标气体分子具有选择性，将通过化学修饰再次增加官能团。*这些基于氧化石墨烯的气体传感器将以超高的灵敏度和选择性促进目标气体分子的室温检测，并提供一种低成本和更长寿命的替代目前商用基准的电化学气体传感器。******

In this project, we will create functionalized Graphene-oxide membrane based interdigitated chemiresistive and semiconductor gas sensors. We will investigate new methods of 2D synthesis of graphene oxide films and membrane functionalization for selective gas detection at room temperature. To illustrate its commercial utility, we will conduct laboratory testing of the sensors alongside die encapsulation, and prototype packaging. ****The engineering design challenges include patterning thin film Graphene oxide on a custom interdigitated die. The graphene film needs to be chemically functionalized so it can be receptive to detecting a specific gas or volatile organic compound. While there are a few good reference recipes that offer a reasonable starting point, the exact requirements for the end user needs to be understood so that a robust multi-modal sensor is produced to reliably detect an alarm condition, in presence of detectable levels of the target gas. For the grapehen-FET gas sensor design, we will deposit thin film graphene over interdigitated source and drain electrodes, over a bottom gate-graphene oxide dielectric. In order to make graphene oxide selective to target gas molecules, functional groups will again be added through chemical modification.****These graphene oxide based gas sensors will facilitate room temperature detection of target gas molecules with ultra high sensitivity and selectivity, and offer a low-cost and longer lifespan alternative to the current commercial benchmark of electrochemical gas sensors. ******