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

• Type: Article in International Scientific Journal
• Date: 2008

Authors

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

Journal

Title: Journal of Physical Chemistry C

Vol. 112 No. 7

Pages: 2428-2435

ISSN: 1932-7447

Publisher: American Chemical Society

Indexing

ISI Web of Knowledge - 10 Citations

Scopus - 8 Citations

Scientific classification

FOS: Engineering and technology > Materials engineering

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8