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Updated: Apr 18, 2026

The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids
Published on: September 30, 2014
Dielectric constant of liquids confined in the extended nanospace measured by a streaming potential method
Kyojiro Morikawa1, Yutaka Kazoe, Kazuma Mawatari
1Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology , 2-12-1-N1-6, O-Okayama, Meguro, Tokyo 152-8550, Japan.
Abstract:
Understanding liquid structure and the electrical properties of liquids confined in extended nanospaces (10-1000 nm) is important for nanofluidics and nanochemistry. To understand these liquid properties requires determination of the dielectric constant of liquids confined in extended nanospaces. A novel dielectric constant measurement method has thus been developed for extended nanospaces using a streaming potential method. We focused on the nonsteady-state streaming potential in extended nanospaces and successfully measured the dielectric constant of liquids within them without the use of probe molecules. The dielectric constant of water was determined to be significantly reduced by about 3 times compared to that of the bulk. This result contributes key information toward further understanding of the chemistry and fluidics in extended nanospaces.
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