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Modified Polyaniline Nanofibres for Ascorbic Acid Detection

Published online by Cambridge University Press:  28 March 2011

Larisa Florea ,
Emer Lahiff  and
Dermot Diamond
Larisa Florea
Affiliation:
CLARITY: The Centre for Sensor Web Technologies, Dublin City University, Dublin 9, Ireland.
Emer Lahiff
Affiliation:
CLARITY: The Centre for Sensor Web Technologies, Dublin City University, Dublin 9, Ireland.
Dermot Diamond
Affiliation:
CLARITY: The Centre for Sensor Web Technologies, Dublin City University, Dublin 9, Ireland.
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Abstract

Polyaniline nanofibres (PAni) can be surface modified to improve electroactivity over a broader pH range. The technique we describe here can be used to attach carboxylic acid terminated substituents. Modified nanofibres maintain their high surface area, and ability to switch between different redox states. These properties make the material suitable for sensing applications. Unlike unmodified PAni, the functionalised material is self-doping and hence more stable in higher pH solutions. Here we demonstrate how modified PAni fibres can be used for the detection of ascorbic acid.

Keywords

polymerchemical synthesissensor

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