Preparation and characterization of polyaniline films by the "in-situ" deposition method. / Preparação e caracterização de filmes de polianilina pelo método de disposição "in situ".

AUTOR(ES)
DATA DE PUBLICAÇÃO

2001

RESUMO

A method for deposition of polyaniline, PAni, onto glass substrates was studied. Substrates were inserted in the solution in which the polymerization reaction occurs. This method performed "in situ", at the temperature of 0 °C, gives very uniform films and allows the control of the thickness. Thickness, of the order of hundred nm, can be controlled varying the concentration of the solution in which the polymerization occurs. The morphology of the PAni layer was studied using a force atomic microscope, AFM. The roughness increased on the time of deposition of the layer and with the decrease of the concentration of the solution. In order to demonstrate the use of the PAni layer an electro luminescent device was built using as active polymer poly(-fenylene vinylene) -dodecilbenzene sulphonate of sodium, PPV-DVS, and the PAni layer as injector of holes and was transparent window for the emitted light. The device showed that it could be operated with a voltage that is three times smaller than a corresponding device without the PAni layer.

ASSUNTO(S)

"in-situ" deposition polyaniline adsorption kinetics deposição "in-situ" cinética de adsorção polianilina surface morphology morfologia de superfície

ACESSO AO ARTIGO

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