Issue 12, 2002
From the journal:

Journal of Materials Chemistry

Hybrid materials based on lichen–polysiloxane matrices: application as electrochemical sensors

M. Darder,a   M. Colilla,a   N. Larab  and  E. Ruiz-Hitzky*a  

* Corresponding authors

a Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, 28049 Madrid, Spain
E-mail: eduardo@icmm.csic.es

b Departamento de Química, Facultad de Ciencias Básicas, Universidad de Antofagasta, Casilla, Antofagasta, Chile

Abstract

Chemically modified electrodes based on the incorporation of lichens in a rigid matrix obtained by sol–gel process show higher ruggedness and stability than conventional carbon paste electrodes. The lichen ion-exchange properties in the uptake of metal ions are combined with the improved physical characteristics of the synthesized materials. SEM, EIS and AS-LSV techniques have been applied to characterize the sol–gel/lichen materials and to evaluate their ability in the construction of electrochemical devices. The coating of solid graphite electrodes with the lichen–polysiloxane materials by means of a spin-coating process allows the development of robust electrochemical sensors. Such devices exhibit a long-time stability and a suitable electroanalytical performance in the amperometric determination of heavy metal ions in water samples. The impedancimetric response of the sensor towards sodium ions has been also demonstrated.

Graphical abstract: Hybrid materials based on lichen–polysiloxane matrices: application as electrochemical sensors

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Article information

DOI
https://doi.org/10.1039/B207105C
Article type
Paper
Submitted
22 Jul 2002
Accepted
09 Oct 2002
First published
30 Oct 2002

J. Mater. Chem., 2002,12, 3660-3664

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Hybrid materials based on lichen–polysiloxane matrices: application as electrochemical sensors

M. Darder, M. Colilla, N. Lara and E. Ruiz-Hitzky, J. Mater. Chem., 2002, 12, 3660 DOI: 10.1039/B207105C

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