Parylene C coated microelectrodes for scanning electrochemical microscopy

Fernando Cortes-Salazar, Haiqiang Deng, Pekka Peljo, Carlos M. Pereira, Kyösti Kontturi, Hubert H. Girault*

*Tämän työn vastaava kirjoittaja

    Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

    13 Sitaatiot (Scopus)


    Herein, we present a simple microelectrode preparation methodology consisting in coating a platinum wire or a carbon fiber with a thin insulating Parylene C film (e.g. 1-10 mu m), to produce SECM probes with a small and constant probe RG (i.e. ratio between the radius of the insulating sheath and the radius of the active electrode area). After exposition of a fresh active electrode area by blade cutting, a disc shaped electrode is obtained thanks to a protective hot mounting wax layer that avoids Parylene C coating deformation and is easily removed with acetone. Stiffness and straightness of the probe can be tuned by modifying the Parylene C coating thickness and the length of the carbon fiber or platinum wire. This simple electrode preparation method is highly reproducible (c.a. > 90%). The prepared Parylene C coated microelectrodes were characterized by optical microscopy, cyclic voltammetry, scanning electrochemical microscopy (SECM) approach curves and finally applied to SECM imaging of Pt band structures in contact-less and contact mode. (C) 2013 Elsevier Ltd. All rights reserved.

    JulkaisuElectrochimica Acta
    DOI - pysyväislinkit
    TilaJulkaistu - 1 marraskuuta 2013
    OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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