| Budget Amount *help |
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2017: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2016: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2015: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
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| Outline of Final Research Achievements |
A copolymer brush was applied to the surface of silica fine particles having a particle size of 5 microns using MMA, LMA, CBMA as monomers. The alignment state of 5CB around the composite fine particles was observed at room temperature under crossed-Nicol arrangement with a polarization microscope (POM). An oriented structure having Boojum defect and Saturn-ring defect at the same time (called Hexadecapolar colloid) was observed around the P(MMA-r-LMA)-brush-decorated fine particles. For fine particles with P(MMA-r-CBMA) brushes, Hedgehog defect showing strong vertical orientation was observed when the molecular weight of the brush is low, and with increasing the molecular weight, Saturn ring defect, Hexadecapolol colloid, ultimately, Boojum defect was observed. Similar molecular-weight dependence on 5CB alignment was observed with the P(LMA-r-CBMA)-brush-decorated fine particles, showing vertical to horizontal orientation change with increasing the molecular weight of the brush.
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