New materials with detachable azobenzene: effective, colourless and extremely stable surface relief gratings

Goldenberg, Leonid M.; Kulikovsky, Lazar; Kulikovska, Olga; Stumpe, Joachim

doi:10.1039/b918130j

Cited by 46 publications

(42 citation statements)

References 14 publications

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“…A sophisticated solution has been reported that involves the formation of colorless SRGs by the use of the SRG-forming materials with detachable azobenzene units. 15,16 Another novel solution has also been reported that involves photoinduced SRG formation on films containing photochromic compounds other than azobenzenes in which one of the two stable isomers is colorless. [17][18][19][20] Finally, a solution of particular interest has been reported, in which SRGs on amorphous molecular films of photochromic spirooxazine were shown to be erasable by heating.…”

Section: Introductionmentioning

confidence: 99%

Facile one-step photopatterning of polystyrene films

Ubukata

Moriya

Yokoyama

2012

Polym J

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The development of nano-and micropatterned materials is a key component of advanced nanotechnology. We report herein, a photo-based method for patterning general-purpose polymer films. Patterned ultraviolet (UV) light irradiation of a thin polystyrene film under controlled temperature generates surface relief structures by mass transfer from shaded to irradiated areas. The resulting surface relief structure can be arbitrarily erased by heating and reconstructed by patterned UV light irradiation, and this process is repeatable. This new method thus enables fabrication of dynamic reversible patterning structures from various general polymers.

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Section: Introductionmentioning

confidence: 99%

Facile one-step photopatterning of polystyrene films

Ubukata

Moriya

Yokoyama

2012

Polym J

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“…Transparency SR films have been achieved using an azobenzene-containing polymeric film; the azobenzene groups were detached from the polymeric materials after SR formation, 13,14 but the fabrication process was complicated. Additionally, transparent photoreactive materials that are sensitive to the UV region have been investigated to form molecularly reoriented SR structures, but an annealing process is necessary for reorientation and SR formation.…”

mentioning

confidence: 99%

Photoinduced reorientation and polarization holography in a new photopolymer with 4-methoxy-N-benzylideneaniline side groups

Kawatsuki¹,

Matsushita²,

Kondo³

et al. 2013

Apl Materials

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The photoinduced reorientation and surface relief (SR) formation behaviors of a novel photosensitive polymer, which was transparent in visible region, were investigated using linearly polarized-313-nm light and holographic exposure with a 325-nm He-Cd laser. The polymer was comprised of photosensitive 4-methoxy-N-benzylideneaniline side groups, and exhibited a sufficient photoinduced molecular reorientation with a birefringence of 0.11. Holographic exposure generated a SR structure, which had a periodical molecular reorientation that depended on the polarization of the interference beams. The generated SR height was ∼212 nm, and the inscription of a double holographic exposure yielded a two-dimensional SR structure

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“…In addition, the position of the absorption bands of both the trans and cis state leads to typically yellow-colored coatings, which is often not desired. It has been shown that for specific linear azo polymers, this color can be removed, leading to permanent topographies [51]. Extensive research towards new applicable light triggered molecules [113] can lead to a more natural approach where the sun can be used as the light source [114].…”

Section: Discussionmentioning

confidence: 99%

“…Most interestingly, Kim et al showed in 1995 that orthogonal recording of two gratings leads to a two-dimensional grating. Stumpe and co-workers have shown that these higher dimensional gratings can also be fabricated from more easily accessible azo-containing polymers [51,52], leading even to colorless gratings via decoupling of the azobenzene after recording [51]. They achieved this by decomposing the urea group connecting the azobenzene to the polymeric chain.…”

Section: Light-induced Permanent Surface Relief Gratings In Linear Azmentioning

confidence: 99%

Light-Triggered Formation of Surface Topographies in Azo Polymers

et al. 2017

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Properties such as friction, wettability and visual impact of polymer coatings are influenced by the surface topography. Therefore, control of the surface structure is of eminent importance to tuning its function. Photochromic azobenzene-containing polymers are an appealing class of coatings of which the surface topography is controllable by light. The topographies form without the use of a solvent, and can be designed to remain static or have dynamic properties, that is, be capable of reversibly switching between different states. The topographical changes can be induced by using linear azo polymers to produce surface-relief gratings. With the ability to address specific regions, interference patterns can imprint a variety of structures. These topographies can be used for nanopatterning, lithography or diffractive optics. For cross-linked polymer networks containing azobenzene moieties, the coatings can form topographies that disappear as soon as the light trigger is switched off. This allows the use of topography-forming coatings in a wide range of applications, ranging from optics to self-cleaning, robotics or haptics.

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New materials with detachable azobenzene: effective, colourless and extremely stable surface relief gratings

Abstract: New detachable azobenzene-containing materials produced via solid state reaction of urea formation were used for the inscription of effective, colourless and stable surface relief gratings.

Cited by 46 publications

References 14 publications

Facile one-step photopatterning of polystyrene films

Facile one-step photopatterning of polystyrene films

Photoinduced reorientation and polarization holography in a new photopolymer with 4-methoxy-N-benzylideneaniline side groups

Light-Triggered Formation of Surface Topographies in Azo Polymers

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