1988 Fiscal Year Final Research Report Summary
Quantitative Evaluation of Crystalline Defects in Langmuir-Blodgett Film
| Project/Area Number |
62470097
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
高分子物性
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| Research Institution | Kyushu University |
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Principal Investigator |
KAJIYAMA Tisato Faculty of Engineering, Kyushu University, 工学部, 教授 (60037976)
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| Co-Investigator(Kenkyū-buntansha) |
UCHIDA Motoko Faculty of Engineering, Kyushu University, 工学部, 教務員 (20183204)
KIKUCHI Hirotsugu Faculty of Engineering, Kyushu University, 工学部, 助手 (50186201)
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| Project Period (FY) |
1987 – 1988
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| Keywords | Langmuir-Blodgett film / monolayer / crystalline defect / melting temperature / crystalline relaxation temperature / electron diffraction technique / X線回折法 |
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| Research Abstract |
In this study, the quantitative evaluation of crystalline defects in monolayer and langmuir-blodgett (LB) film and the preparation of them with low crystalline defects were investigated. The melting temperature, Tm and crystalline relaxation one, T c of fatty acid monolayers on the water surface was evaluated from the relationships between the subphase temperature, Tsp dependence of static viscoelasticities and the aggregation structure of them. It was made clear that the surface pressure-area isotherm of monolayer represented the gathering process of isolated domains, which were formed right after spreading on the water surface. From the relationship between Tm and Tsp, the monolayers were classified into the crystalline one and the amorphous one. On the basis of electron diffraction technique, the crystalline defects, D in monolayer were evaluated. In comparison with crystalline monolayer (D = 4 %), the crystallized monolayer, which was obtained by the crystallization of amorphous one on the water surface, had very low value of crystalline defects (D = 1.5 %). On the other hand, the crystalline defects in LB film were evaluated on the basis of X-ray diffraction technique. It became clear that the crystalline defects in LB film were controlled by the condition of preparation. These results should be very useful for preparation of the LB film with no crystalline defect.
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