http://www.cnr.it/ontology/cnr/individuo/prodotto/ID302939

Instability-induced pattern formation of photoactivated functional polymers (Articolo in rivista)

Type

Label

Instability-induced pattern formation of photoactivated functional polymers (Articolo in rivista) (literal)

Anno

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

Alternative label

Galinski, Henning; Ambrosio, Antonio; Maddalena, Pasqualino; Schenker, Iwan; Spolenak, Ralph; Capasso, Federico (2014)
Instability-induced pattern formation of photoactivated functional polymers
in Proceedings of the National Academy of Sciences of the United States of America
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Galinski, Henning; Ambrosio, Antonio; Maddalena, Pasqualino; Schenker, Iwan; Spolenak, Ralph; Capasso, Federico (literal)

Pagina inizio

Pagina fine

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

Rivista

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

Note

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

Harvard University; Consiglio Nazionale delle Ricerche (CNR); University of Naples Federico II; Swiss Federal Institute of Technology Zurich; Swiss Federal Institute of Technology Zurich (literal)

Titolo

Instability-induced pattern formation of photoactivated functional polymers (literal)

Abstract

Since 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. (literal)

Prodotto di