Détail de la notice
Titre du Document
Polypyrrole -porous silicon nanocomposites
Auteur(s)
POPA C. ; TURCU R. ; CRACIUNESCU I. ; ...
Résumé
In this work we report the synthesis and characterization of the polypyrrole - porous silicon nanocomposites. Our main goal is to control the growth of conducting polypyrrole into the alveolar pores of porous silicon, in order to get a functionalized nanocomposite with the required properties for application as electrode in microfluidic devices. Porous silicon was electrochemically etched from (100) p-type silicon wafers. Different silicon resistivities (from 1.8 to 11 Ω·cm) and preparation conditions (different electrolyte concentrations and current densities) were used. The electrodeposition of polypyrrole into porous silicon was carried out galvanostatically, at a constant current density 2.5 mA/cm2 from a solution containing acetonitrile, the monomer, pyrrole and p-toluensulfonic acid as electrolyte. The polymerization time was varied in order to investigate the growing process of polypyrrole into the pores. The morphology and of the as-prepared nanocomposites was investigated by SEM. The existence of PPY into porous silicon is evidenced by the EDX spectra of the nanocomposite. The electrical characterization evidences the relative contributions of the polypyrrole and the substrate resistivity, respectively.
Editeur
INOE 2000
Identifiant
ISSN : 1454-4164
Source
Journal of optoelectronics and adavnced materials A. 2008, vol. 10, n° 9, pp. 2319-2324 [6 pages]
Langue
Anglais
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