2013 Fiscal Year Final Research Report
Demonstration of thermal fluctuation temperature sensor using nano-gap electrode
| Project/Area Number |
24651161
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Microdevices/Nanodevices
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
FUJII Teruo 東京大学, 生産技術研究所, 教授 (30251474)
FUKUBA Tatsuhiro 独立行政法人海洋研究開発機構, 技術研究主任 (80401272)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | マイクロ化学システム / ナノ流体システム / NEMS / 1分子分析 / 電気インピーダンス |
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| Research Abstract |
Electric double layer is the local distribution of ions created at any liquid and solid interface. Because the thickness of the electric double layer is typically in nanometer scale and the size of nanospace is as the same order of magnitude as the thickness of electric double layer, the nanospace should be partially/totally filled with an electric double layer.Here, electrical impedance spectroscopy was used to comprehensively investigate how the ionic concentration and the volume of nanospace influence on the electrical properties of various ionic solutions in a nanochannel. The electkinetic properties and the thickness of electric double layer in the nanospace were determined to be dependent on the hydration diameter, mobility, and ionic strength of the various ion spices. The electric double layer overlaps under particular conditions, such as with a sufficiently narrow channels, and the qualitative properties of this were consistent with the Debye-Huckel-Onsager equation.
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