Direct measurement of kinetic properties of molecular layer by electric field tweezers system
Project/Area Number |
20760049
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Single-year Grants |
Research Field |
Applied physics, general
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Research Institution | Tokyo Denki University |
Principal Investigator |
HOSODA Maiko Tokyo Denki University, 理工学部, 講師 (40366406)
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Project Period (FY) |
2008 – 2009
|
Project Status |
Completed (Fiscal Year 2009)
|
Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2009: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2008: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
|
Keywords | 物理計測 / 制御 / 電場ピックアップ / 液膜の振動モード / DLVO相互作用 / 電界ピンセット / 液体表面 / 粘性 / 非接触 / 共鳴現象 / 高圧電場 / スペクトロスコピー / 流体運動 |
Research Abstract |
The electric field tweezers is the measurement system of the local surface properties of the soft materials. The system excites the surface mechanical vibration on the surface with non-contact manner with dielectric force. Electric field is applied by a needle electrode set just above the sample surface, which picks up the surface of the dielectric materials. The amplitude of the surface deformation gives the measure for the surface tension as restoring force, while the time constant of the deformation yields the viscosity. We can determine the shear viscosity and the surface tension uniquely by measuring the dynamic behavior of the liquid film with non-contact manner. In this study, we applied the electric tweezers system to measure the local mechanical properties of liquid thin films. We can determine the DLVO interaction of the sample from the time constants of symmetric (spray) and asymmetric (bending) modes. The system was also employed for the rapid measurement of highly viscous liquids. The principle experimentally proved is now considered for the application of very slow and accurate mechanical actuator.
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Report
(3 results)
Research Products
(13 results)