Photopatterning of Discotic Liquid-Crystalline Gels

Moriyama, Masaya; Mizoshita, Norihiro; Kato, Takashi

doi:10.1295/polymj.36.661

Cited by 34 publications

(22 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…[56,309] Die Größe der Flüssig-kristalldomänen in einem diskotischen flüssigkristallinen Gel mit einem Azobenzol-Gelbildner ist photochemisch steuerbar. [310] …”

Section: Strukturen Physikalischer Flüssigkristalliner Geleunclassified

Funktionelle flüssigkristalline Aggregate: selbstorganisierte weiche Materialien

2005

Self Cite

View full text Add to dashboard Cite

Dynamische weiche Materialien werden im 21. Jahrhundert an Bedeutung gewinnen. Zwar sind diese Funktionsmaterialien nicht so beständig wie Metalle, Keramiken oder Plastik, dafür reagieren sie aber gut auf externe Reize. Geordnete weiche Materialien können dynamische Funktionen erfüllen. Flüssigkristalle aus selbstorganisierten Molekülen sind ein Beispiel hierfür: Sie eignen sich möglicherweise zum Elektronen‐, Ionen‐ oder Stofftransport sowie als sensorisch, katalytisch, optisch oder biologisch aktive Materialien. Um diese Funktionen auszuschöpfen, benötigt man unkonventionelle Materialentwürfe. Hier beschreiben wir aktuelle Ansätze zur Funktionalisierung von Flüssigkristallen und zeigen, wie das Design von Flüssigkristallen durch supramolekulare Aggregation und Nanophasentrennung zu einer Vielfalt selbstorganisierter Funktionsmaterialien führt.

show abstract

“…[56,309] Die Größe der Flüssig-kristalldomänen in einem diskotischen flüssigkristallinen Gel mit einem Azobenzol-Gelbildner ist photochemisch steuerbar. [310] …”

Section: Strukturen Physikalischer Flüssigkristalliner Geleunclassified

Funktionelle flüssigkristalline Aggregate: selbstorganisierte weiche Materialien

2005

Self Cite

View full text Add to dashboard Cite

show abstract

“…262,263 Use of photofunctional gelators bearing azobenzene groups leads to the photoswitching of the LC gel structures. 267,268 CONCLUSIONS An overview of the development of functional LC polymers are described in this review. A wide variety of molecular and supramolecular structures, and molecular self-assembled structures have been introduced into the materials design of the LC polymers.…”

Section: Functional Lc Polymers and Networkmentioning

confidence: 99%

Functional liquid-crystalline polymers and supramolecular liquid crystals

Kato

Uchida

Ichikawa

et al. 2017

Polym J

Self Cite

100

View full text Add to dashboard Cite

The design and functions of liquid-crystalline (LC) polymers with classifying them into conventional-, supramolecular-, dendriticand network-type LC polymers are described. LC polymers show new functions as new devices in the field of energy and environment by incorporating mesogenic moieties exhibiting photonic, electronic and ionic functions. Supramolecular LC polymers show dynamic and unique properties because the mesogenic moieties are built with non-covalent interactions. Dendritic-type LC polymers exhibit liquid crystallinity by nanosegregation of aromatic and aliphatic moieties. Dendritic fork-like mesogens have also been prepared. A variety of nonmesogeic functional building blocks including fullerene, π-conjugated moieties, catenane, rotaxane and others can be incorporated into LC phases by attaching these dendritic moieties. LC networks are constructed in situ polymerization of polymerizable nematic or nanostructured liquid crystals. The specific characteristics of the LC networks have generated new research trends to develop well-defined polymers that exhibit optical, transport and separation properties. In these materials, through suitable design of LC monomers, the preservation of smectic, columnar and bicontinuous cubic phases has been successfully used for the development of membranes with one-dimensional, two-dimensional and three-dimensional nanostructures.

show abstract

“…[5] The molecular orientation in the LC phase has also been found to drive the arrangement of fibrous aggregates in the case of smectic and columnar phases resulting in the formation of structural patterns. [4,6,7] We now report an ordered self-assembly of elongated fibrous aggregates of a simple alkanoic acid organogelator 12-Hydroxy stearic acid (12-HSA) within the nematic (N) phase which is a lesser ordered LC and is formed by E7 which is a mixture of four cyanobiphenyls. This leads to a periodic structural motif whose dimensions can be varied depending on the relative concentration of the NLC and the gelator.…”

Section: Introductionmentioning

confidence: 98%

“…The molecular orientation in the LC phase has also been found to drive the arrangement of fibrous aggregates in the case of smectic and columnar phases resulting in the formation of structural patterns ,,…”

Section: Introductionmentioning

confidence: 99%

Periodic Grating‐like Patterns Induced by Self‐Assembly of Gelator Fibres in Nematic Gels

2018

View full text Add to dashboard Cite

Periodic orientation patterns occurring in nematic gels, revealed by optical and scanning electron microscopy, are found to be formed by spontaneous self-assembly of fibrous aggregates of a low-molecular-weight organogelator in an aligned thermotropic liquid crystal (LC). Self-organization into periodic structures is also reflected in a calorimetric study, which shows the occurrence of three thermoreversible states, namely, isotropic liquid, nematic and nematic gel. The segregation and self-assembly of the fibrous aggregates leading to pattern formation are attributed to the highly polar LC and to hydrogen bonding between gelator molecules, as shown by X-ray diffraction and vibrational spectroscopy. This study aims to investigate in detail the effect of the chemical nature and alignment of an anisotropic solvent on the morphology of the gelator fibres and the resulting gelation process. The periodic organization of LC-rich and fibre-rich regions can also provide a way to obtain templates for positioning nanoparticle arrays in an LC matrix, which can lead to novel devices.

show abstract

Photopatterning of Discotic Liquid-Crystalline Gels

Cited by 34 publications

References 25 publications

Funktionelle flüssigkristalline Aggregate: selbstorganisierte weiche Materialien

Funktionelle flüssigkristalline Aggregate: selbstorganisierte weiche Materialien

Functional liquid-crystalline polymers and supramolecular liquid crystals

Periodic Grating‐like Patterns Induced by Self‐Assembly of Gelator Fibres in Nematic Gels

Contact Info

Product

Resources

About