| Project/Area Number |
08044087
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| Research Category |
Grant-in-Aid for international Scientific Research
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| Allocation Type | Single-year Grants |
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| Section | Joint Research |
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| Research Field |
物性一般(含基礎論)
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| Research Institution | HIROSHIMA UNIVERSITY |
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Principal Investigator |
TAKEDA Takayoshi (1997) Hiroshima University, Faculty of Integrated Arts and Sciences, Associate Professor, 総合科学部, 助教授 (70034593)
好村 滋洋 (1996) 広島大学, 総合科学部, 教授 (50034583)
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| Co-Investigator(Kenkyū-buntansha) |
MONKENBUSCH Michael Germany, Forschungszentrum Julich GmbH,Research Associate, 固体物理部, 研究員
RICHTER Dieter Germany, Forschungszentrum Julich GmbH,Professor, 固体物理部, 教授
SETO Hideki Hiroshima University, Faculty of Integrated Arts and Sciences, Research Associat, 総合科学部, 助手 (60216546)
MONKENBUSCH エム ユーリヒ研究センター, 固体物理部, 研究員
MONKENBUSCH ミハエル ユーリッヒ研究センター, 固体物理部, 研究員
RICHTER Diet ユーリッヒ研究センター, 固体物理部, 教授
武田 隆義 広島大学, 総合科学部, 助教授 (70034593)
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| Project Period (FY) |
1996 – 1997
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| Project Status |
Completed (Fiscal Year 1997)
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| Budget Amount *help |
¥7,000,000 (Direct Cost: ¥7,000,000)
Fiscal Year 1997: ¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 1996: ¥3,500,000 (Direct Cost: ¥3,500,000)
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| Keywords | neutron spin echo / slow dynamics / Complex Fluids / dynamic structure factor / membrane / microemulsion / amphiphiles / surfactant / 中性子散乱 / 両親媒分子 / 両親媒 |
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| Research Abstract |
We have been improving a neutron spin echo (NSE) spectrometer at CZ_2 port of JRR-3M, JAERI.Performance tests of the new monochromator constructed in collaboration with ILL, Grenoble, France and HMI, Berlin, Germany indicate a threefold increase in polarized neutron flux at the sample compared to the previous one. Our NSE experiments using MESS at LLB in Saclay, France showed that the performance of our NSE spectrometer was comparable to that of MESS.In order to further gain neutron intensity, we have been installing a detector system with an assembly of position sensitive detectors.
NSE experiments have been performed to study the slow dynamics such as membrane undulation in Complex Fluids involving amphiphiles. Intermediate correlation functions I(Q,t) obtained from our IiSE.experiments were well fitted to the equation I(Q,t) =I(Q,O)[(GAMMAt)2/3] for the dipalmitoylphosphatidylcholine (DPPC)-water-CaCl_2 system and for the low temperature and high temperature bicontinuous microemulsion phases and the lamella phase of the nonionic surfactant C_<12>E_5/ n-octane / water system, and also for the dense droplet phase of, the temperature-induced and the pressure-induced lamella phases of the ionic swfactant AOT / n-decane / water system. The relaxation rate GAMMA increased as Q_3. From these results, the theory of Zilman and Granek, in which they use the Heifrich bending free energy to describe membrane undulations in sponge and lamellar phases, was first supported by o ur NSE experiments. We estimated the bending modulus of the membranes using their theory. For aqueous solutions of non-ionic surfactant C_<16>E_7 with wormlike micelles, the results that I(Q,t) =I(Q,O)[(GAMMAt)3/4]and GAMMA increased as Q ^<8/3> are also explained by their theory for 1-dimensional polymer-like model.
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