Anomalous long-range repulsion between crystal-forming colloids in supercritical fluids
Project/Area Number |
22740284
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Single-year Grants |
Research Field |
Biophysics/Chemical physics
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Research Institution | Japan Agency for Marine-Earth Science and Technology |
Principal Investigator |
KOYAMA Takehito 独立行政法人海洋研究開発機構, 海洋・極限環境生物圏領域, 研究員 (50533858)
|
Project Period (FY) |
2010 – 2011
|
Project Status |
Completed (Fiscal Year 2011)
|
Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2011: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2010: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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Keywords | 超臨界流体 / コロイド分散系 / 密度揺らぎ / コロイド結晶 / 粒子間相互作用 |
Research Abstract |
We studied the origin of anomalous long-range repulsion between silica-beads in supercritical ethanol. We verified the screening of the repulsion by addition of electrolyte in ethanol and concluded that this repulsion is electrostatic repulsion. It was indicated that the repulsion was induced by density fluctuations of ethanol. Same results were obtained in acetone. These are strongly indicated that the phenomenon has solvent universality and the fluctuations cause the repulsion.
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Report
(3 results)
Research Products
(21 results)