Stochastic detection and characterisation of individual ferrocene derivative tagged graphene nanoplatelets

• Tipo: Artigo em Revista Científica Internacional
• Data: 2016

Autores

Wu, HY (Autor) Outra; Lin, QW (Autor) Outra; Batchelor McAuley, C (Autor) Outra; Goncalves, LM (Autor) Outra; Lima, CFRAC (Autor) FCUP; Compton, RG (Autor) Outra

Revista

Título: The Analyst

Vol. 141

Páginas: 2696-2703

ISSN: 0003-2654

Editora: Royal Society of Chemistry

Indexação

ISI Web of Knowledge - 14 Citações

Scopus - 0 Citações

Outras Informações

ID Authenticus: P-00K-GPF

DOI: 10.1039/c5an02550h

Abstract (EN): Graphene nanoplatelets (GNPs) are 'tagged' with 1-(biphen-4-yl)ferrocene. Chronoamperometry is then utilised to observe single particle impacts when GNPs suspended in solution collide with a carbon fibre micro wire electrode held at an oxidising potential, resulting in current/time transient "spikes". The impacts are associated with two types of charge transfer: Faradaic due to oxidation of the 'tag' and capacitative due to disruption of the double layer. Analysis of the spikes suggests approximate monolayer coverage of 1-(biphen-4-yl)ferrocene on the GNP surfaces, with a surface coverage of (2.2 +/- 0.3) x 10(-10) mol cm(-2). In contrast non-derivatised ferrocene does not exhibit any significant adsorption on the GNP material.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8