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연구과제번호 |
D00018 |
선정년도 |
2005 년
|
과제진행현황 |
종료 |
제출상태 |
재단승인 |
등록완료일 |
2007년 10월 28일 |
연차구분 |
결과보고 |
결과보고년도 |
2007년 |
연구결과보고서
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초록
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Orientation ordering of a synthetic perfluorinated supramolecule containing a hydrophilic core group and perfluorinated tails is strongly affected by the functionality, molecular shape, surface anchoring and magnetic field. Small-angle neutron scatter ...
Orientation ordering of a synthetic perfluorinated supramolecule containing a hydrophilic core group and perfluorinated tails is strongly affected by the functionality, molecular shape, surface anchoring and magnetic field. Small-angle neutron scattering (SANS), synchrotron X-ray diffraction, polarized light microscopy (PLM) and transmission electron microscopy (TEM) results show that the molecule exhibits hexagonal columnar mesophase upon cooling from isotropic phase. The orientation of the columns was controlled by surface anchoring; the columnar axes were perpendicular to the hydrophobic carbon substrates, while planar alignment is favored on hydrophilic surfaces. Furthermore, the columnar domains align with the magnetic field lines, which is due to diamagnetism of these fanshaped molecules containing aromatic rings. We show that the magnetic-induced alignment is much effective for the large-scale control of the orientation of the perfluorinated columnar mesophase.
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연구결과 및 활용방안
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We have shown that the magnetic-field alignment is induced as a result of the diamagnetic character of the aromatic rings within the inner core of the supramolecular columns. It is important to emphasize that building blocks are composed of aromatic r ...
We have shown that the magnetic-field alignment is induced as a result of the diamagnetic character of the aromatic rings within the inner core of the supramolecular columns. It is important to emphasize that building blocks are composed of aromatic rings and rigid biphenylene moieties, and the original nano-sized architecture is not destroyed under the influence of an external force. Thus, it is likely that the ability of these materials to self-organize is not smaller than the effect of the given magnetic field.
본 사업 결과는 PHYSICA B 에 게재되었으며, 이러한 결과를 바탕으로 2007.10월 인터넷 상으로 게재완료되어 출판예정인 세계적인 학술지(Imapact factor: 19)인 Nature Materials(제목: Internal structure visualization and lithographic use of periodic toroidal holes in liquid crystals)에 까지 연결되어 세계적인 연구성과를 이룰 수 있었다.
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색인어
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Perfluorinated supramolecule; Small-angle neutron scattering; Surface anchoring; Magnetic field; Orientation
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