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Shin, Tae Joo
UNIST Synchrotron Radiation Research Laboratory
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  • Synchrotron Radiation Application Researches

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Physico-chemical confinement of helical nanofilaments

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Title
Physico-chemical confinement of helical nanofilaments
Author
Lee, SKim, HShin, Tae JooTsai, ERichardson, JMKorblova, EWalba, D. MClark, NALee, SBYoon, DK
Keywords
Optical properties; X ray diffraction Chemical affinities; Grazing incidence X-ray diffraction; In-situ experiments; Molecular configurations; Physical confinement; Structural complexity; Structural evolution; Thermal transitions
Issue Date
2015-05
Publisher
ROYAL SOC CHEMISTRY
Citation
SOFT MATTER, v.11, no.18, pp.3653 - 3659
Abstract
Helical nanofilaments (HNFs) have attracted much interest because of their unique optical properties, but there have been many hurdles to overcome in using them for the practical applications due to their structural complexity. Here we demonstrate that the molecular configuration and layer conformation of a modulated HNF (HNFs((mod))) can be studied using a physicochemical confinement system. The layer directions affected by the chemical affinity between the mesogen and surface were drastically controlled in surface-modified nanochannels. Furthermore, an in situ experiment using grazing-incidence X-ray diffraction (GIXD) was carried out to investigate in detail the structural evolution through thermal transitions. The results demonstrate that the HNF(mod) structure can be perfectly controlled for functional HNF device applications, and a combined system with chemical and physical confinement effects will be helpful to better understand the fundamentals of soft matter
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DOI
10.1039/c5sm00417a
ISSN
1744-683X
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