Characterization and Manipulation of Graphene Edge by Electrochemistry

我们旨在区分石墨烯作为电化学电极时石墨烯基面和石墨烯边缘的响应。我们的想法是使用基面面积相同但边缘长度不同的交错石墨烯电极。我们已经设计了这样的电极，并开发了制造工艺。我们从一些电极上观察到分配给低维结构的电化学信号。同时，我们制作了表面被还原氧化石墨烯完全覆盖的交错电极。我们已经证实了电化学反应的差异取决于电极的氧化还原物质。这些电极被用于检测皮质醇，一种压力标记物。

We aimed at distinguishing the responses from graphene basal plane and graphene edge when the graphene is used as an electrochemical electorde. Our idea is to use the interdigitated graphene electrodes with the same basal plane area but different edge lengths. We have designed such electrodes and developed the fabrication processes. We have observed the electrochemical signals assignable to the low dimensional structures from some of the electrodes. In parallel, we fabricated the interdigitated electrodes whose surface are fully covered by reduced graphene oxide. We have confirmed the difference in electrochemical responses depending on the redox species from the electrodes. The electrodes have been applied to the detection of cortisol, a stress marker.