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<b>Use of the optical lithography in the development of disposable carbon based electrodes</b> - doi: 10.4025/actascitechnol.v35i1.11915
oleh: Lucilene Dornelles Mello, Alexandre Kisner, Arnaldo Pereira, Lauro Tatsuo Kubota
Format: | Article |
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Diterbitkan: | Universidade Estadual de Maringá 2013-01-01 |
Deskripsi
<p class="aresumo">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)<sub>6</sub><sup>3-</sup>/Fe(CN)<sub>6</sub><sup>4-</sup> in KCl 0.1 mol L<sup>-1 </sup>and electrochemical impedance spectroscopy (EIS). The electrodes showed an E°’ = ½ (E<sub>pa</sub> + E<sub>pc</sub>) » 229 (± 2) mV <em>vs</em> SCE (n = 4), with DEp » 235 (± 14) mV (n = 4). Other studies showed a linear behavior of the peak current (I<sub>p</sub>) both anode and cathode with v<sup>1/2</sup>, 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.</p> <p class="akeyword"> </p>