2003 Fiscal Year Final Research Report Summary
Development of high speed and two-dimensional measurement system for the diffusion coefficient in a microscale sample
| Project/Area Number |
14350113
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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 |
Thermal engineering
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| Research Institution | Keio University |
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Principal Investigator |
NAGASHIMA Akira Keio Univ., Dept. of Science and Technology, Professor, 理工学部, 教授 (80051514)
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| Co-Investigator(Kenkyū-buntansha) |
NAGASAKA Yuji Keio Univ., Dept. of Science and Technology, Professor, 理工学部, 教授 (40129573)
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| Project Period (FY) |
2002 – 2003
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| Keywords | Thermophysical properties / Diffusion coefficient / Diffusion in liquids / The Soret effect / Microscale sample |
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| Research Abstract |
In order to measure the diffusion coefficient of a micro sample and in micro scale, a new measurement system for the diffusion coefficient, which adopted the Soret effect with the diffraction and uses the heterodyne interferometer, has been developed. Results are summarized as follows;
1, Adopting the Soret effect for generating the concentration distribution, the macroscopic flux of solvent is avoided.
Measurement of the diffusion coefficient in a micro sample (<5μl) was demonstrated.
3, Short measurement time of within 100 ms was attained.
4, Concentration dependence of the diffusion coefficient of fullerene in o-dichlorobenzene was measured. The decrease of the diffusion coefficient was found in high-concentration side of the solution. It indicates that aggregation of fullerenes occurred.
5, Measurement of two-dimensional distribution of diffusion coefficient in micro scale (<5μm) has been successfully conducted. The results indicated the applicability of the new measurement system using a heterodyne interferometer to measure the diffusion coefficient of micro scale samples.
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Research Products
(13 results)
