Dielectric Constant of Liquids Confined in the Extended Nanospace Measured by a Streaming Potential Method

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• 作者：Kyojiro Morikawa ; Yutaka Kazoe ; Kazuma Mawatari ; Takehiko Tsukahara ; Takehiko Kitamori
• 刊名：Analytical Chemistry
• 出版年：2015
• 出版时间：February 3, 2015
• 年：2015
• 卷：87
• 期：3
• 页码：1475-1479
• 全文大小：287K
• ISSN：1520-6882

文摘

Understanding liquid structure and the electrical properties of liquids confined in extended nanospaces (10鈥?000 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.