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Detalhes Referência

Tipo
Artigos em Revista

Tipo de Documento
Artigo Completo

Título
Electrochemical, Microgravimetric and AFM Studies of Polythionine Films. Application as New Support for the Immobilisation of Nucleotides.

Participantes na publicação
Virginia C Ferreira (Author)
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA
 Dep. Química e Bioquímica
 Dep. Química e Bioquímica
 CQB
 A. Tenreiro (Author)
L. M. Abrantes. (Author)

Resumo
The experimental conditions for the thionine potentiodynamic electropolymerisation in acidic media are optimised in order to achieve polythionine (PTN) modified electrodes with high stability and reproducible redox behaviour in acidic and biological compatible media. The data obtained by cyclic voltammetry and electrochemical quartz crystal microbalance (EQCM) show that under the selected conditions, polythionine films growth, presents a non-linear relation between mass and electroactivity which suggests structural changes during electropolymerisation, that are corroborated by atomic force microscopy (AFM). The pH effect in the redox switching of PTN films is studied in solutions with pH from 1.3 to 12 where two processes with different dependence on protons occurs in the interval from 5.5 to 9, indicating a complex behaviour. PTN redox conversion in acidic media is film thickness sensitive and a non-permselective behaviour is found in acidic and neutral media, being the mass change dependent on the electrolyte nature. The presence of free amino functions in the polymer structure enable the nucleotide immobilisation by adsorption and covalent attachment, which was simultaneously monitored by EQCM and open circuit potential. The nucleotidic phosphate groups reactivity is enhanced by adding coupling agents leading to an higher amount of mass immobilisation.

Data de Submissão/Pedido
2005-10-20
Data de Aceitação
2006-01-10
Data de Publicação
2006-02-21

Instituição
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA

Suporte
SENSORS AND ACTUATORS B-CHEMICAL

Identificadores da Publicação
ISSN - 0925-4005

Volume
119
Fascículo
2

Página Inicial
632
Página Final
641

Identificadores do Documento
DOI - https://doi.org/ 10.1016/j.snb.2006.01.024

Identificadores de Qualidade
Web Of Science Q1 (2017) - 5.667 - ELECTROCHEMISTRY - SCIE
SCOPUS Q1 (2011) - 1.474 - Surfaces, Coatings and Films
SCIMAGO Q1 (2016) - 1.343 - Surfaces, Coatings and Films

Keywords
Nucleotides immobilisation Polythionine modified electrodes Electrochemical quartz crystal microbalance Atomic force microscopy

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APA
Virginia C Ferreira, A. Tenreiro, L. M. Abrantes., (2006). Electrochemical, Microgravimetric and AFM Studies of Polythionine Films. Application as New Support for the Immobilisation of Nucleotides. . SENSORS AND ACTUATORS B-CHEMICAL, 119, 632-641. ISSN 0925-4005. eISSN .

IEEE
Virginia C Ferreira, A. Tenreiro, L. M. Abrantes., "Electrochemical, Microgravimetric and AFM Studies of Polythionine Films. Application as New Support for the Immobilisation of Nucleotides. " in SENSORS AND ACTUATORS B-CHEMICAL, vol. 119, pp. 632-641, 2006.  10.1016/j.snb.2006.01.024

BIBTEX
@article{24505, author = {Virginia C Ferreira and A. Tenreiro and L. M. Abrantes.}, title = {Electrochemical, Microgravimetric and AFM Studies of Polythionine Films. Application as New Support for the Immobilisation of Nucleotides. }, journal = {SENSORS AND ACTUATORS B-CHEMICAL}, year = 2006, pages = { 632-641}, volume = 119 }