Micro-drilling of polymer tubular ultramicroelectrode arrays for electrochemical sensors

Research output: Contribution to journalJournal article – Annual report year: 2013Researchpeer-review

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We present a reproducible fast prototyping procedure based on micro-drilling to produce homogeneous tubular ultramicroelectrode arrays made from poly(3,4-ethylenedioxythiophene) (PEDOT), a conductive polymer. Arrays of Ø 100 μm tubular electrodes each having a height of 0.37 ± 0.06 μm were reproducibly fabricated. The electrode dimensions were analyzed by SEM after deposition of silver dendrites to visualize the electroactive electrode area. The electrochemical applicability of the electrodes was demonstrated by voltammetric and amperometric detection of ferri-/ferrocyanide. Recorded signals were in agreement with results from finite element modelling of the system. The tubular PEDOT ultramicroelectrode arrays were modified by prussian blue to enable the detection of hydrogen peroxide. A linear sensor response was demonstrated for hydrogen peroxide concentrations from 0.1 mM to 1 mM.
Original languageEnglish
JournalSensors
Volume13
Issue number5
Pages (from-to)6319-6333
ISSN1424-8220
DOIs
Publication statusPublished - 2013
CitationsWeb of Science® Times Cited: No match on DOI

    Research areas

  • Drills, Electrochemical sensors, Finite element method, Hydrogen peroxide, Microelectrodes, Peroxides, Sensors, Electrochemical electrodes

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ID: 55997917