Influência da espessura nas propriedades de absorção e emissão e na morfologia de filmes automontados de poli(p-fenileno vinileno)


Autoria(s): Piovesan,Erick; Hidalgo,Ángel Alberto; Marletta,Alexandre; Vega,Maria Leticia; Ruggiero,Reinaldo
Data(s)

01/10/2006

Resumo

In this report, we studied the thickness effect on the optical and morphological properties of self-assembled (SA) poly(p-phenylenevinylene) (PPV) films, wich were processed with 5 and 75 layers from a PPV precursor polymer and dodecylbenzenesulfonate, and then, thermally converted at 230 °C. The increase of the film thickness yielded more intense peaks in the vibrational spectral range. The electron-phonon coupling was quantified by the Huang - Rhys factor, that shows the effects on the polymer chain mobility in the interface substrate/polymer. A strong emission anisotropy r=0.57 was observed for the film with 5 layers of thickness decreasing to 0.34 for the film with 75 layers. Finally, the surface topology of the films was measured using Atomic Force Microscopy.

Formato

text/html

Identificador

http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422006000500006

Idioma(s)

pt

Publicador

Sociedade Brasileira de Química

Fonte

Química Nova v.29 n.5 2006

Palavras-Chave #poly(p-phenylene vinylene) #self-assembled films #thickness effect
Tipo

journal article