Orientation control of a synthetic columnar perfluorinated supramolecular dendrimer: Surface anchoring and magnetic-field induced alignments

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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 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 fan-shaped 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. (c) 2006 Elsevier B.V. All rights reserved.
Publisher
Elsevier Science Bv
Issue Date
2006-11
Language
English
Article Type
Article; Proceedings Paper
Keywords

ENERGY; FILMS

Citation

PHYSICA B-CONDENSED MATTER, v.385, no.SI, pp.801 - 803

ISSN
0921-4526
URI
http://hdl.handle.net/10203/7951
Appears in Collection
NT-Journal Papers(저널논문)CBE-Journal Papers(저널논문)
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