| Project/Area Number |
10450022
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Applied optics/Quantum optical engineering
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| Research Institution | TOHOKU UNIVERSITY |
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Principal Investigator |
SUGIMOTO Tadao Institute for Advanced Materials Processing, Tohoku University, Professor, 素材工学研究所, 教授 (80235895)
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| Co-Investigator(Kenkyū-buntansha) |
ITOH Hiroyuki Institute for Advanced Materials Processing, Tohoku University, Research Associate, 素材工学研究所, 助手 (00213083)
MARUMATSU Atsushi Institute for Advanced Materials Processing, Tohoku University, Associate Professor, 素材工学研究所, 助教授 (40210059)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥8,500,000 (Direct Cost: ¥8,500,000)
Fiscal Year 1999: ¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1998: ¥6,600,000 (Direct Cost: ¥6,600,000)
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| Keywords | Laser trapping / Interparticle force / Fine particles / Optical tweezers / Colloidal particles / Ordering / Floating particles / Long-distance interaction / レーザートッピング / 遠距離相互作用力 / コロイド粒子間力 / 長距離相互作用 / 多粒子間力 / 直接測定 |
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| Research Abstract |
The intrinsic interparticle forces have been determined as a function of the separation using the technology of the optical trapping with a double laser beam which has been developed in this laboratory.
In this research, the interactive forces between two free colloidal particles floating at the surface of aqueous solutions have been focused. Long-distance repulsive forces were measured as a function of the separation, and the effects of electrolyte concentrations, pH values, and surface tensions of the solutions on the interparticle forces have been elucidated.
The results would reveal the essential aspect of the interparticle interaction and the mechanism of two-dimensionally ordering of colloidal particles at the interface.
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