2003 Fiscal Year Final Research Report Summary
Development of low-frequency domain spectroscopy at liquid interfaces using ultra-short laser pulse and its applications
| Project/Area Number |
14350442
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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 |
工業分析化学
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| Research Institution | The University of Tokyo |
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Principal Investigator |
SAWADA Tsuguo The University of Tokyo, Graduate School of Frontier Sciences, Professor, 大学院・新領域創成科学研究科, 教授 (90011105)
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| Co-Investigator(Kenkyū-buntansha) |
IKEZOE Yasuhiro The University of Tokyo, Graduate School of Engineering, Research assistant(Researcher), 大学院・工学系研究科, 教務職員(研究職) (70334315)
KATAYAMA Kenji The University of Tokyo, Graduate School of Frontier Sciences, Research Associate, 大学院・新領域創成科学研究科, 助手 (00313007)
FUJINAMI Masanori The University of Tokyo, Graduate School of Frontier Sciences, Associate Professor, 大学院・新領域創成科学研究科, 助教授 (50311436)
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| Project Period (FY) |
2002 – 2003
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| Keywords | interface / ultra-short laser pulse / low-frequency / second harmonic generation / coherent / biological membrane / 非線形現象 |
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| Research Abstract |
The aim of this research is the observation of the collective behavior of the molecular a ssemblies at liquid interfaces in the low-frequency domain. At first, as important systems of the collective behaviors of the molecular assemblies at liquid interfaces, we investigate d the dynamic behavior of surfactants molecules in nonlinear chemical oscillation system and the kinetics of the hydrolysis reactions of biological membrane. We obtained new information of these systems in. terms of the dynamic behavior of the ion transfer across the membrane and specific interaction between ions and molecules at the interfaces.
We have developed the equipment to observe vibrational spectra of the molecular assemblies at liquid interfaces in low-frequency domain. We have succeeded to obtain low-frequency vibrational spectrum from the surface of GaAs plate through the change of SHG signals. induced by the change of the nonlinear susceptibility due to the coherent vibration of the molecular assemblies or lattices. We have also applied the transient grating configuration to the abovementioned system, we successfully obtained background free signal from the air/liquid interface where coumarin dyes were dispersed.
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Research Products
(17 results)
