Positively Charged Surface Functionalised Carbon Nanoparticles as Binding Sites for Redox Active Species

John Watkins ,  Ruth Lawrence ,  James E. Taylor ,  Stephen D. Bull ,  Frank Marken 

University of Bath, Department of Chemistry, Claverton Down, Bath BA2-7AY, United Kingdom

Abstract

Emperor 2000 carbon nanoparticles are functionalised by a terminating sulfonate group which bares a negative charge. Work has previously been done using a binder mixture of chitosan with these carbon nanoparticles to create a stable film with good conductivity and more useful terminating amine groups.1,2

Watkins_scheme.png

Scheme 1. Functionalisation of the positively charged carbon nanoparticles by a two step synthesis.

This work presents an alternative to the use of binders in which the carbon nanoparticles were directly re-functionalised by a two step synthesis shown in Scheme 1. This has lead to the creation of stable films showing a terminating amine group which can be evaporated onto electrodes and used to strongly bind negatively charged species such as indigo carmine without the need for binding agents.

(1)       Rassaei, L.; Bonne, M. J.; Sillanpaa, M.; Marken, F. New J. Chem. 2008, 32, 1253.

(2)       Rassaei, L.; Sillanpaa, M.; Marken, F. Electrochim. Acta 2008, 53, 5732.

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Presentation: Short communication at SMCBS'2009 International Workshop, by John Watkins
See On-line Journal of SMCBS'2009 International Workshop

Submitted: 2009-09-03 20:00
Revised:   2009-09-03 20:16
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