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.
Highlights
Introduction to MicrofabricationWest Sussex: Wiley; 2010:119–128. 17
These mixing results indicate that a transverse flow component was induced by the herringbone grooves
In conclusion, we investigated flow-induced voltage generation over a graphene monolayer in the presence of staggered herringbone grooves to better understand the origin of the voltage generated
Summary
Introduction to MicrofabricationWest Sussex: Wiley; 2010:119–128. 17. Minster SD: Microfluidic Techniques (Reviews and Protocols). Theoretical and experimental studies have demonstrated that a voltage is generated when carbon nanotubes (CNT) and graphene surfaces are exposed to fluid flows [1,2,3,4,5,6,7,8]. Kral and Shapiro first proposed theoretical mechanisms for flow-induced current generation within metallic single-walled carbon nanotubes (m-SWCNTs) [9]. This flow-induced voltage was experimentally demonstrated for the first time by Sood et al, who used a SWCNT film deposited between electrodes immersed in a flowing liquid [1]. They proposed surface ion hopping as the major mechanism for the flowinduced voltage generation
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