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Type: Artigo de periódico
Title: Use of the optical lithography in the development of disposable carbon based electrodes
Author: Mello, LD
Kisner, A
Pereira, A
Kubota, LT
Abstract: In this study, carbon-based electrodes for disposable use were constructed using the technique of optical lithography. The process consisted in the irradiation of UV light on a layer of photosensitive resin (SU-8 50) deposited on a substrate of PVC. The pattern obtained electrode was filled with carbon paste. The electrodes were characterized by cyclic voltammetric using the reversible system Fe(CN)(6)(3-)/Fe(CN)(6)(4-) in KCl 0.1 mol L-1 and electrochemical impedance spectroscopy (EIS). The electrodes showed an E-o' = 1/2 (E-pa + E-pc) approximate to 229 (+/- 2) mV vs SCE (n = 4), with Delta Ep approximate to 235 (+/- 14) mV (n = 4). Other studies showed a linear behavior of the peak current (I-p) both anode and cathode with v(1/2), probably due to diffuse contribution and/or electron transfer kinetics of the reaction. These parameters are in accordance to with those obtained for screen-printed electrode described in the literature. The good results obtained show the suitability of the electrodes for analytical applications such as development of sensors.
Subject: optical lithography
carbon-paste electrode
cyclic voltammetric
Country: Brasil
Editor: Univ Estadual Maringa, Pro-reitoria Pesquisa Pos-graduacao
Rights: aberto
Identifier DOI: 10.4025/actascitechnol.v35i1.11915
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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