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

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

Research output: Contribution to journalArticlepeer-review

58 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

Bibliographical note

Funding Information:
This work was supported from Center for Advanced Soft Electronics and Green Nano Technology, MEST in Korea.

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


Dive into the research topics of 'Flow-induced voltage generation in non-ionic liquids over monolayer graphene'. Together they form a unique fingerprint.

Cite this