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Electrochemical characterization of poly(3,4-ethylenedioxythiophene)/κ-carrageenan as a biocompatible conductive coat for biologic applications

Published online by Cambridge University Press:  12 September 2018

Priscila Hernandez-Suarez ,
Karla Ramirez ,
Fernando Alvarado ,
E. Avendano  and
Ricardo Starbird
Priscila Hernandez-Suarez*
Affiliation:
Escuela de Ciencia e Ingeniería de Materiales, Instituto Tecnológico de Costa Rica, 159-7050 Cartago, Costa Rica
Karla Ramirez
Affiliation:
Escuela de Biología, Instituto Tecnológico de Costa Rica, 159-7050 Cartago, Costa Rica
Fernando Alvarado
Affiliation:
Escuela de Ciencia e Ingeniería de Materiales, Instituto Tecnológico de Costa Rica, 159-7050 Cartago, Costa Rica
E. Avendano
Affiliation:
Escuela de Física, Universidad de Costa Rica, San José 2060, Costa Rica Centro de Investigación en Ciencia e Ingeniería de Materiales CICIMA, Universidad de Costa Rica, 2060 San José, Costa Rica
Ricardo Starbird*
Affiliation:
Centro de Investigación y de Servicios Químicos y Microbiológicos CEQIATEC, Escuela de Química, Instituto Tecnológico de Costa Rica, 159-7050 Cartago, Costa Rica
*
Address all correspondence to Priscila Hernandez-Suarez, Ricardo Starbird at [email protected], [email protected]
Address all correspondence to Priscila Hernandez-Suarez, Ricardo Starbird at [email protected], [email protected]
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Abstract

Poly(3,4-ethylenedioxythiophene) (PEDOT) is synthesized through a micellar dispersion that allows incorporation of biomolecules into this conductive polymer layer. A PEDOT:κ-carrageenan (κC) system was obtained by electrodeposition and it was compared with a standard PEDOT:sodium dodecyl sulfate electrode coat. The electrochemical behavior and the oxidation level after 1000 cycles were studied through cyclic voltammetry and μRaman spectroscopy. The oxidation ratio in the PEDOT increased while electrochemical activity decreased in both cases. Moreover, the PEDOT:κC system allowed the immobilization of the acetylcholinesterase enzyme, which retained its activity. The unique combination of properties is a key feature in the bioelectronics field.

Type
Research Letters
Information
MRS Communications , Volume 9 , Issue 1 , March 2019 , pp. 218 - 223
Copyright
Copyright © Materials Research Society 2018 

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