Probing of the voltammetric features of graphite electrodes modified with mercaptoundecanoic acid stabilized gold nanoparticles

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

Autores

Rubin Gulaboski (Autor) Outra; Mariana Chirea (Autor) FCUP; Carlos M Pereira (Autor) FCUP; Natalia N D S Cordeiro (Autor) FCUP; Renata B Costa (Autor) Outra; Fernando F Silva (Autor) FCUP

Revista

Título: Journal of Physical Chemistry C

Vol. 112 Nº 7

Páginas: 2428-2435

ISSN: 1932-7447

Editora: American Chemical Society

Indexação

ISI Web of Knowledge - 10 Citações

Scopus - 8 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia dos materiais

Outras Informações

ID Authenticus: P-004-1FN

DOI: 10.1021/jp709670j

Abstract (EN): In this work we report on the remarkable voltammetric features of graphite electrodes, which were modified with mercaptoundecanoic acid derivatized gold nanoparticles (Au-MUA NPs) by simple adsorption from basic aqueous solution. Atomic force microscopy measurements proved a fairly uniform adsorption of the nanoparticles in the form of clusters, and consecutive island formation. The electrochemical features of the modified electrodes were probed by cyclic voltammetry, while using various redox probes in several different setups. The catalytic effects of the adsorbed clusters on the graphite electrodes proved to be highly reproducible, time dependent, and of nonselective nature. The main advantages of the proposed methodology are seen by the simplicity of the modification procedure, the stability of the self-assembled gold nanoparticle film, their applicability in various voltammetric scenarios, and the potential employment of the Au-MUA NP modified electrodes as sensors for various systems.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8