Nanoscale Research Letters
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.
Graphene; Voltage generation; Herringbone grooves; Transverse flow; Microchannel
Lee, Seung Ho; Kang, Young Bok (Abraham); Jung, Wonsuk; Jung, Yousung; Kim, Soohyun; and Noh, Hongseok (Moses), "Flow-Induced Voltage Generation Over Monolayer Graphene in the Presence of Herringbone Grooves" (2013). Faculty Publications - Biomedical, Mechanical, and Civil Engineering. 60.