Implications of the structure for the luminescence properties of NBR-PF blend devices nanostructured as Langmuir-Blodgett films

Implications of the structure for the luminescence properties of NBR-PF blend devices nanostructured as Langmuir-Blodgett films

Author Barbosa, Camila G. Autor UNIFESP Google Scholar
Faez, Roselena Autor UNIFESP Google Scholar
Caseli, Luciano Autor UNIFESP Google Scholar
Peres, Laura O. Autor UNIFESP Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Universidade Federal de São Carlos (UFSCar)
Abstract Properties of polymers in blends can be enhanced if molecular control is achieved. in this paper, we spread nitrile rubber (NBR) and polyfluorene (PF) on the air-water interface to form stable monolayers, as observed with surface pressure-area isotherms and polarization modulation infrared reflection absorption spectroscopy (PM-IRRAS). Mixed monolayers showed that the isotherms were shifted to lower areas in relation to the areas predicted for an ideal mixture, which indicates attractive interactions between the polymeric constituents. Also, the transfer of the polymeric films to solid supports was possible using the Langmuir-Blodgett (LB) technique and the optical properties of the films were evaluated with infrared, UV-vis and fluorescence spectroscopies. Molecular-level interactions between the components lead to marked changes in the properties of the films, which exhibited optical (photoluminescence) properties that could be controlled at the molecular level. (C) 2013 Elsevier B.V. All rights reserved.
Keywords Polyfluorene
NBR
Blend
Langmuir-Blodgett films
Air-water interface
Monolayers
Language English
Sponsor Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Instituto Nacional de Eletronica Organica (INEO)
Grant number FAPESP: FAPESP 2007/50742-2
FAPESP: 2008/10858-9
Date 2014-01-20
Published in Colloids and Surfaces A-physicochemical and Engineering Aspects. Amsterdam: Elsevier B.V., v. 441, p. 398-405, 2014.
ISSN 0927-7757 (Sherpa/Romeo, impact factor)
Publisher Elsevier B.V.
Extent 398-405
Origin http://dx.doi.org/10.1016/j.colsurfa.2013.09.031
Access rights Closed access
Type Article
Web of Science ID WOS:000329260800051
URI http://repositorio.unifesp.br/handle/11600/37318

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