Flow-induced voltage generation over monolayer graphene in the presence of herringbone grooves |
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| Authors: | Seung Ho Lee Young Bok |
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| Affiliation: | 1.Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea;2.Graduate School of Energy, Environment, Water, and Sustainability, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea;3.Mechanical Engineering and Mechanics, Drexel University, Philadelphia, PA 19104, USA |
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| Abstract: | 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. |
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| Keywords: | Graphene Voltage generation Herringbone grooves Transverse flow Microchannel |
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