Monolayer control of discotic liquid crystal by electromigration of dewetted layers in thin film devices (Articolo in rivista)

Type

• Articolo in rivista (Classe)
• Prodotto della ricerca (Classe)

Label

• Monolayer control of discotic liquid crystal by electromigration of dewetted layers in thin film devices (Articolo in rivista) (literal)

Anno

• 2008-01-01T00:00:00+01:00 (literal)

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

• 10.1021/ja801337v (literal)

Alternative label

• Calò, Annalisa (1); Stoliar, Pablo A. (1); Cavallini, Massimiliano (1); Sergeyev, Sergey (2); Geerts, Yves H. (2); Biscarini, Fabio (1) (2008)
  Monolayer control of discotic liquid crystal by electromigration of dewetted layers in thin film devices
  in Journal of the American Chemical Society (Print); American Chemical Society, Washington (Stati Uniti d'America)
  (literal)

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

• Calò, Annalisa (1); Stoliar, Pablo A. (1); Cavallini, Massimiliano (1); Sergeyev, Sergey (2); Geerts, Yves H. (2); Biscarini, Fabio (1) (literal)

Pagina inizio

• 11953 (literal)

Pagina fine

• 11958 (literal)

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

• 130 (literal)

Rivista

• Journal of the American Chemical Society (Rivista)

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

• 6 (literal)

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

• 36 (literal)

Note

• ISI Web of Science (WOS) (literal)

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

• (1) CNR-Institute for the Study of Nanostructured Materials, Via Gobetti 101, 40129 Bologna, Italy (2) Laboratory of Polymer Chemistry CP 206/1, UniVersite ? Libre de Bruxelles, BouleVard du Triomphe, 1050 Bruxelles, Belgium (literal)

Titolo

• Monolayer control of discotic liquid crystal by electromigration of dewetted layers in thin film devices (literal)

Abstract

• We show that ultrathin films of a semiconductive discotic liquid crystal, viz. phthalocyanines, can be organized to form a conductive channel tens of microns long between Au electrodes with thickness control over a single monolayer. Our approach exploits the electromigration of the isotropic phase formed starting from the pretransitional region of the columnar-isotropic phase transition. Dewetted isotropic material accumulates to the negative electrode by applying a longitudinal electric field of about 1 V/?m. Dewetting and electromigration expose an ultrathin film, a few monolayers thick, exhibiting columnar liquid crystal order. The layers of this ultrathin film melt progressively above TC and can be individually exfoliated by electromigration, starting from the ninth down to the first monolayer. The analysis of the current flowing through the junction as a function of the temperature, together with the comparative imaging of the evolution of morphology, yields a detailed picture of the changes in the dimensionality of the conductive phthalocyanine film and allows us to extract the behavior of the order parameter. The phenomenon of electromigration opens interesting questions on the technological control of individual monolayers on device patterns. (literal)

Editore

• American Chemical Society (Editore)

Prodotto di

• Nanotecnologie di materiali multifunzionali e sistemi biologici (PM.P05.010.001) (Modulo)
• Istituto per lo studio dei materiali nanostrutturati (ISMN) (Istituto)

Autore CNR

• FABIO BISCARINI (Unità di personale interno)
• MASSIMILIANO CAVALLINI (Unità di personale interno)

Incoming links:

Autore CNR di

• MASSIMILIANO CAVALLINI (Unità di personale interno)
• FABIO BISCARINI (Unità di personale interno)

Prodotto

• Istituto per lo studio dei materiali nanostrutturati (ISMN) (Istituto)
• Nanotecnologie di materiali multifunzionali e sistemi biologici (PM.P05.010.001) (Modulo)

Editore di

• American Chemical Society (Editore)

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

• Journal of the American Chemical Society (Rivista)