Preparation and characterization of poly[Ni(salen)(crown receptor)]/multi-walled carbon nanotube composite films

• Tipo: Artigo em Revista Científica Internacional
• Data: 2008

Autores

Tedim, J (Autor) Outra; Goncalves, F (Autor) Outra; Pereira, MFR (Autor) FEUP; Figueiredo, JL (Autor) FEUP; Moura, C (Autor) Outra; Freire, C (Autor) FCUP; Hillman, AR (Autor) Outra

Revista

Título: Electrochimica Acta

Vol. 53

Páginas: 6722-6731

ISSN: 0013-4686

Editora: Elsevier

Indexação

ISI Web of Knowledge - 27 Citações

Scopus - 30 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: P-003-VQP

DOI: 10.1016/j.electacta.2008.01.079

Abstract (EN): Nanocomposite films comprising walled carbon nanotubes (MWCNTs) embedded within poly [Ni(3-Mesalophen-b15-c5)] were deposited on Pt and ITO electrode surfaces by the potentiodynamic polyrnerisation of [Ni(3-Mesalophen-b15-c5)] from solutions containing dispersed MWCNTs. Composites incorporating carbon nanotubes subject to a range of oxidising pre-treatments were compared with those incorporating untreated carbon nanotubes and with the pure polymer. In both cases the use CH3CN and CH2Cl2 as fabrication and characterization media were explored. Films were characterized by voltammetry. electrochemical impedance spectroscopy and scanning electron microscope (SEM). The coating of the carbon nanotubes with polymer varied significantly with pre-treatment and solvent medium; this influenced the final composite morphology and electrical properties. Performance enhancement of the polymer component by the presence of the carbon nanotubes was manifested through the ability to store charge and the ease with which this Could he accomplished; these were parameterized via increased redox capacitance and decreased charge-transfer resistance, respectively. Correlation of impedance parameters with SEM images provided a morphological rationale for composite electrical properties.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10