2012 Fiscal Year Final Research Report
Design of soft-supramolecular systems based on metal complexes
| Project Area | Emergent Chemistry of Nano-scale Molecular System |
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| Project/Area Number |
20111008
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| Research Category |
Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
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| Research Institution | Kyushu University |
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Principal Investigator |
KIMIZUKA Nobuo 九州大学, 工学研究院・応用化学部門, 教授 (90186304)
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| Co-Investigator(Kenkyū-buntansha) |
KUROIWA Keita 崇城大学, 工学部・ナノサイエンス学科, 准教授 (70336006)
MORIKAWA Masa-aki 九州大学, 大学院・工学研究院, 助教 (10363384)
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| Project Period (FY) |
2008 – 2012
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| Keywords | ナノ材料 / 複合材料 / 超分子化学 / 自己組織化 |
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| Research Abstract |
The term “self-assembly” encompasses two features - one is static self-assembly which occurs near at the thermal equilibrium, and the other is dynamic (or dissipative) self-assembly that emerge at far from thermodynamic equilibrium. Until now, emergence of nano-scale dissipative structures has not been reported. In this study, we have shown that nano-scale dissipative structures are self-assembled from Au(OH)_4- and tetra-alkyl ammonium ions at the aqueous/organic interface. We define dissipative nano-structures as steady-state populations of ordered molecular assemblies that are maintained only under nonequilibrium conditions, i.e, by continuously supplying energy to the system. As such structures dissipate at thermal equilibrium, it was necessary to convert them to stable nanostructures so that they become observable by electron microscopy. In this study, the dissipative nanostructures of Au(OH)_4-/tetra-alkyl ammonium ion pairs self-assembled at the liquid-liquid interface under far-from-equilibrium conditions was photo-reduced to gold nanowires which contain regularly positioned nanocavities. It was produced by photochemical reduction of. Linear dissipative nanostructures emerged in conjunction with the continuous vectorial transport of tetra-alkyl ammonium ions across the interface.
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