Efficient surface relief grating generated in azobenzene-containing material using an He–Ne laser

Goldenberg, Leonid M.; Gritsai, Yuri; Stumpe, Joachim

doi:10.1088/2040-8978/13/7/075601

Cited by 16 publications

(11 citation statements)

References 24 publications

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“…22 p(m-DY7) and p(o-MHA), having well-separated π−π* and n−π* bands, are rather unconventional for SRG formation, yet they confirm that it is not the extent of initial absorption, but efficient trans−cis−trans cycling that is key to efficient SRG formation in the context of amorphous materials. 46 Because the initial absorption at writing wavelength, 488 nm, is already lower than at the π−π* absorption, the thickness of the films is not an issue and the films can, for example, be easily manipulated from the backside if needed. Although p(DY7) is more efficient in terms of absolute SRG formation efficiency, in terms of how efficiently the absorbed photons are transferred into mass transport of the polymer, p(m-DY7) is clearly superior to the conjugated p(DY7).…”

Section: Chemistry Of Materialsmentioning

confidence: 99%

Are Two Azo Groups Better than One? Investigating the Photoresponse of Polymer-Bisazobenzene Complexes

et al. 2014

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Azobenzene chromophores are an ideal choice for material applications where functionality needs to be activated in a precise remote-controlled fashion. The azobenzene stimuli-response falls into two categories, either based on efficient trans-to-cis photoisomerization and a high cis yield enabling on−off type functions, or relying on a fast trans−cis−trans cycling creating motion in the material system. Herein, we show that using bisazochromophores instead of the more common monoazobenzene derivatives makes a difference in the performance of light-responsive azopolymers, more specifically in photo-orientation and all-optical surface patterning. Our findings point out that polymer-bisazobenzene complexes are an attractive alternative as high-performance photoreponsive materials and that although their properties are highly sensitive to the extent of conjugation in the system, they can be designed into relatively transparent films with high performance for all-optical patterning.

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Section: Chemistry Of Materialsmentioning

confidence: 99%

Are Two Azo Groups Better than One? Investigating the Photoresponse of Polymer-Bisazobenzene Complexes

et al. 2014

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“…[7][8][9] During this process, the polymer topography deforms following the distribution of the intensity or polarization of the incoming UV light. [10][11][12][13][14][15][16][17][18][19] The process takes place in air, where the polymer film is solid-like.…”

Section: Introductionmentioning

confidence: 99%

Polymer brushes modified by photosensitive azobenzene containing polyamines

Kopyshev

Galvin

Genzer

et al. 2016

Polymer

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This paper describes a strategy for preparing photosensitive polymeric grafts on flat solid surfaces by loading diblock-copolymer or homopolymer brushes with cationic azobenzene-containing surfactants. In contrast to previous work, we utilize photosensitive surfactants that bear positivelycharged polyamine head groups whose charge varies between 1+ and 3+. Poly(methyl methacrylateb-methacrylic acid) (PMMA-b-PMAA) brushes were prepared by employing atom transfer radical

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“…Among them, SRGs have attracted rapidly increasing attention because they are promising candidates for optical data storage, 31,32 micro/nanopatterning 28,[33][34][35][36][37][38] and chemical sensing. 39,40 SRGs can be inscribed on the azo polymer films at a temperature well below their glass transition temperatures (T g ) upon irradiation with interfering polarization laser beams with an appropriate wavelength, [41][42][43][44] and they are erasable by thermal treatment or by irradiation with a uniform circularly polarized laser beam. 20,31,45 During this process, the azo molecules undergo a reversible trans-cis-trans isomerization and are aligned perpendicularly to the electrical field vector of the polarization light through the repetition of such isomerization cycles.…”

Section: Introductionmentioning

confidence: 99%

Easily crosslinkable side-chain azobenzene polymers for fast and persistent fixation of surface relief gratings

et al. 2015

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A series of side-chain azobenzene (azo) homo-and copolymers with easily crosslinkable Nhydroxysuccinimide carboxylate-substituted azo moieties and relatively low glass transition temperatures were synthesized for rapid and persistent fixation of surface relief gratings (SRGs). These azo polymers exhibited good thermal stability and their films proved easily crosslinkable within 4-15 min with 1,6-hexanediamine under mild conditions with the crosslinking rates of copolymer films being faster than 10 homopolymer films. Moreover, the formation speed and saturation modulation depth of the photoinduced SRGs increased both with a decrease in the flexible spacer length in azo homopolymers and with an increase in the azo contents in copolymers. Furthermore, considerably stabilized high quality SRGs were obtained after their post-fixation by crosslinking, as revealed by the negligible or rather small change of both the modulation depth of the crosslinked SRGs upon their exposure to high temperatures or organic 15 solvents and the transparency of the crosslinked polymer films.

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Efficient surface relief grating generated in azobenzene-containing material using an He–Ne laser

Cited by 16 publications

References 24 publications

Are Two Azo Groups Better than One? Investigating the Photoresponse of Polymer-Bisazobenzene Complexes

Are Two Azo Groups Better than One? Investigating the Photoresponse of Polymer-Bisazobenzene Complexes

Polymer brushes modified by photosensitive azobenzene containing polyamines

Easily crosslinkable side-chain azobenzene polymers for fast and persistent fixation of surface relief gratings

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