Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea.
Nanoscale Res Lett. 2013 Nov 20;8(1):487. doi: 10.1186/1556-276X-8-487.
While flow-induced voltage over a graphene layer has been reported, its origin remains unclear. In our previous study, we suggested different mechanisms for different experimental configurations: phonon dragging effect for the parallel alignment and an enhanced out-of-plane phonon mode for the perpendicular alignment (Appl. Phys. Lett. 102:063116, 2011). In order to further examine the origin of flow-induced voltage, we introduced a transverse flow component by integrating staggered herringbone grooves in the microchannel. We found that the flow-induced voltage decreased significantly in the presence of herringbone grooves in both parallel and perpendicular alignments. These results support our previous interpretation.
虽然已经报道了在石墨烯层上的流动感应电压，但其起源仍不清楚。在我们之前的研究中，我们针对不同的实验配置提出了不同的机制：对于平行排列，声子拖拽效应；对于垂直排列，增强的面外声子模式（ Appl. Phys. Lett. 102:063116, 2011）。为了进一步研究流动感应电压的起源，我们在微通道中集成交错的人字形凹槽来引入横向流动分量。我们发现，在平行和垂直排列中，存在人字形凹槽时，流动感应电压显著降低。这些结果支持我们之前的解释。
