名古屋大学 · 材料科学
Hara教授の研究室は、有機・無機ハイブリッド材料を基盤とし、特にπ-π相互作用を活用したナノ構造の精密制御を追求しています。特に、垂直配向を実現する画期的な戦略や、染料の自己集合によるカラム状液晶のシリカネットワークへの固定化技術を開発しています。これにより、光配向やフォトリソグラフィーを応用した光機能性ナノハイブリッド材料の創出が可能になっています。
Figures are computed from collected data and may differ slightly.
The development of vertically aligned mesochannels in organic/inorganic hybrid films is in high demand and a challenging issue. However, there are no clear guiding principles to attain the surface-mediated vertical alignment. This work proposes the first clear versatile strategy to achieve the vertical alignment by utilizing the π-π interaction between the organic template molecule of a planar discotic liquid crystalline and 2D π-plane of graphite. The crucial role of the π-π interaction can be
Some dye molecules self-aggregate to exhibit a lyotropic columnar liquid crystal state (chromonic liquid crystal) via pi stacking in relatively highly concentrated aqueous solutions. In this work, the chromonic liquid crystal structure was immobilized, for the first time, with silica networks by way of the sol-gel condensation process. The immobilization of the columnar structure was successfully attained in the presence of 2-(2-aminoethoxy)ethanol, which favorably mediates the interface between
We recently found that the chromonic mesophase structure of an azo dye can be immobilized by a silica network to form a chromonic–silica nanohybrid. This work reports the first demonstration of the macroscopic photoalignment and photopatterning of this nanohybrid via surface-mediated orientational transfer from a photocrosslinkable liquid crystalline polymer (PPLC). Irradiation with linearly polarized light (LPL) 300 nm above the PPLC film followed by an appropriate annealing process led to stro
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