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dc.contributor.authorGalinski, Henning
dc.contributor.authorAmbrosio, Antonio
dc.contributor.authorMaddalena, Pasqualino
dc.contributor.authorSchenker, Iwan
dc.contributor.authorSpolenak, Ralph
dc.contributor.authorCapasso, Federico
dc.date.accessioned2019-09-17T13:29:14Z
dc.date.issued2014
dc.identifier.citationGalinski, Henning, Antonio Ambrosio, Pasqualino Maddalena, Iwan Schenker, Ralph Spolenak, and Federico Capasso. 2014. “Instability-Induced Pattern Formation of Photoactivated Functional Polymers.” Proceedings of the National Academy of Sciences 111 (48): 17017–22. https://doi.org/10.1073/pnas.1409718111.
dc.identifier.issn0027-8424
dc.identifier.issn0744-2831
dc.identifier.issn1091-6490
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41371506*
dc.description.abstractSince the pioneering work of Turing on the formation principles of animal coat patterns [Turing AM (1952) Phil Trans R Soc Lond B 237(641): 37-72], such as the stripes of a tiger, great effort has been made to understand and explain various phenomena of self-assembly and pattern formation. Prominent examples are the spontaneous demixing in emulsions, such as mixtures of water and oil [Herzig EM, et al. (2007) Nat Mater 6: 966-971]; the distribution of matter in the universe [Kibble TWB (1976) J Phys A: MathGen 9(8): 1387]; surface reconstruction in ionic crystals [Clark KW, et al. (2012) Nanotechnol 23(18): 185306]; and the pattern formation caused by phase transitions in metal alloys, polymer mixtures and binary Bose-Einstein condensates [Sabbatini J, et al. (2011) Phys Rev Lett 107: 230402]. Photoactivated pattern formation in functional polymers has attracted major interest due to its potential applications in molecular electronics and photoresponsive systems. Here we demonstrate that photoactivated pattern formation on azobenzene-containing polymer films can be entirely explained by the physical concept of phase separation. Using experiments and simulations, we show that phase separation is caused by an instability created by the photoactivated transitions between two immiscible states of the polymer. In addition, we have shown in accordance with theory, that polarized light has a striking effect on pattern formation indicated by enhanced phase separation.
dc.language.isoen_US
dc.publisherNational Academy of Sciences
dash.licenseLAA
dc.titleInstability-induced pattern formation of photoactivated functional polymers
dc.typeJournal Article
dc.description.versionVersion of Record
dc.relation.journalProceedings of the National Academy of Sciences of the United States of America
dash.depositing.authorCapasso, Federico::c84ca12d0f20adc982c7c314bebd7c9e::600
dc.date.available2019-09-17T13:29:14Z
dash.workflow.comments1Science Serial ID 91169
dc.identifier.doi10.1073/pnas.1409718111
dash.source.volume111;48
dash.source.page17017


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