Flow-induced voltage generation in non-ionic liquids over monolayer graphene

Seung Ho Lee, Yousung Jung, Soohyun Kim, Chang-Soo Han

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36 Citations (Scopus)


To clarify the origin of the flow-induced voltage generation in graphene, we prepared a new experimental device whose electrodes were aligned perpendicular to the flow with a non-ionic liquid. We found that significant voltage in our device was generated with increasing flow velocity, thereby confirming that voltage was due to an intrinsic interaction between graphene and the flowing liquid. To understand the mechanism of the observed flow-induced voltage generation, we systematically varied several important experimental parameters: flow velocity, electrode alignment, liquid polarity, and liquid viscosity. Based on these measurements, we suggest that polarity of the fluid is a significant factor in determining the extent of the voltage generated, and the major mechanism can be attributed to instantaneous potential differences induced in the graphene due to an interaction with polar liquids and to the momentum transferred from the flowing liquid to the graphene.

Original languageEnglish
Article number063116
JournalApplied Physics Letters
Issue number6
Publication statusPublished - 2013 Feb 11


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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