Mono- and multilayers of photoreactive polymers as collective and active supramolecular systems

Seki, Takahiro

doi:10.1016/0968-5677(96)00006-5

Cited by 18 publications

(12 citation statements)

References 25 publications

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“…This resulted from the different affinities of the trans-and cis-azobenzene to the water surface. [7,8] From the viewpoint of applications, polymer gels and solid films are of greater interest than monolayers. However, gels have a serious disadvantage in that their response is slow, and the deformation of solid films is too small to be practically utilized.…”

Section: Photochromic Amorphous Systemsmentioning

confidence: 99%

“…They expanded when exposed to UV light and shrank when exposed to visible light. This resulted from the different affinities of the trans ‐ and cis ‐azobenzene to the water surface 7,8. From the viewpoint of applications, polymer gels and solid films are of greater interest than monolayers.…”

Section: Photochromic Amorphous Systemsmentioning

confidence: 99%

“…[5][6][7][8] Recently, by using liquid-crystalline elastomers (LCEs), not only photocontraction but also photoinduced bending has been acquired. [9][10][11][12][13][14][15][16][17][18] In comparison with contraction/expansion which is a two-dimensional action, bending (a three-dimensional movement) should be advantageous for artificial hands and medical microrobots that are capable of completing particular manipulations.…”

Section: Introductionmentioning

confidence: 99%

“…Starting in the 1960s, several amorphous polymer systems, including monolayers, gels and solid films, have been developed for the research of photoinduced contraction/expansion 5–8. Recently, by using liquid‐crystalline elastomers (LCEs), not only photocontraction but also photoinduced bending has been acquired 9–18.…”

Section: Introductionmentioning

confidence: 99%

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Photodeformable Polymers: A New Kind of Promising Smart Material for Micro‐ and Nano‐Applications

Ikeda

2005

Macro Chemistry & Physics

104

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Summary: Starting in the 1960s, several kinds of photodeformable polymers have been developed, such as monolayers, polymer gels, solid films and liquid‐crystalline elastomers with different photodeformation mechanisms. This field evolved slowly until recently when significant achievements have been made. Most recently, Lendlein and co‐workers have put forward another new concept – using photo‐crosslinking to prepare deformable polymers with various pre‐determined shapes (Nature 2005, 434, 879). This highlight gives a general introduction into photodeformable polymers and brings forth future challenges.

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Section: Photochromic Amorphous Systemsmentioning

confidence: 99%

Section: Photochromic Amorphous Systemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Photodeformable Polymers: A New Kind of Promising Smart Material for Micro‐ and Nano‐Applications

Ikeda

2005

Macro Chemistry & Physics

104

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“…196 Photomechanical effects observed in photochromic monolayers at the air-water interface have also been explained in terms of changes to polarity on photoisomerization. 197,198 Monolayers of poly(vinyl alcohol) with azobenzene side chains were found to expand with UV light and shrink with visible light as a result of the different affinities of trans and cis forms for the water surface. 199,200 Monolayers composed of poly(MMA) containing spiropyran units in the side chains have also been investigated showing a pH dependant increase in surface pressure on UV irradiation and a recovery in the dark.…”

Section: Photo-regulated Wettabilitymentioning

confidence: 99%

Photo-responsive systems and biomaterials: photochromic polymers, light-triggered self-assembly, surface modification, fluorescence modulation and beyond

2010

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There has been considerable interest in the application of photochromism to photo-responsive systems which has led to the development of new tailored smart materials for photonics and biomedical fields. Within a polymeric matrix photochromic isomerizations can be stimulated by light to reversibly alter the physical and chemical properties of a material such as LC phase, shape, surface wettability, permeability, solubility, self-assembly, size and fluorescence. The underlying principles behind photoresponsive behavior, subsequent applications and relevant examples are discussed in this review.

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Photomechanik flüssigkristalliner Elastomere und anderer Polymere

Ikeda

Mamiya

2007

Angewandte Chemie

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Muskeln können chemische Energie in mechanische Arbeit umsetzen. Zur Entwicklung künstlicher Muskeln eignen sich weiche Materialien mit hoher mechanischer Flexibilität und Lebensdauer besser als harte Materialien wie Metalle. Für wirksame muskelähnliche Bewegungen sollten die Materialien Schichtstrukturen und einen hohen molekularen Ordnungsgrad aufweisen. Flüssigkristalline Elastomere (liquid‐crystalline elastomers, LCE) sind diesbezüglich überlegene weiche Materialien, die die Ordnung von Flüssigkristallen und – da sie Polymernetzwerke enthalten – die Elastizität von Elastomeren in sich vereinen. Mit LCEs lassen sich kleine Mengen externer Energie in makroskopisch messbare mechanische Arbeit umwandeln. In diesem Aufsatz konzentrieren wir uns auf Licht als Energiequelle und beschreiben die neuesten Fortschritte auf dem Gebiet weicher Materialien, die Licht direkt in mechanische Arbeit umwandeln können (photomechanischer Effekt), insbesondere die photomechanischen Effekte von LCEs unter dem Blickwinkel der Anwendungsentwicklung lichtgetriebener Aktuatoren.

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Mono- and multilayers of photoreactive polymers as collective and active supramolecular systems

Cited by 18 publications

References 25 publications

Photodeformable Polymers: A New Kind of Promising Smart Material for Micro‐ and Nano‐Applications

Photodeformable Polymers: A New Kind of Promising Smart Material for Micro‐ and Nano‐Applications

Photo-responsive systems and biomaterials: photochromic polymers, light-triggered self-assembly, surface modification, fluorescence modulation and beyond

Photomechanik flüssigkristalliner Elastomere und anderer Polymere

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