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  • "Drill and fill" Lithography for Controlled Fabrication of 3D Platinum Electrodes

    Author(s)
    Rauf, Sakandar
    Shiddiky, Muhammad JA
    Trau, Matt
    Griffith University Author(s)
    Shiddiky, Muhammad J.
    Year published
    2013
    Metadata
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    Abstract
    Reproducible fabrication of three-dimensional (3D) metal electrodes is essential for accurate measurements of analyte in the fields of electroanalytical chemistry and biosensor development. Unfortunately, fabrication of these types of electrodes is complicated by the inherent complexity of current nano-fabrication methodologies. Herein, we report a simple and rapid fabrication method referred to as “drill and fill” lithography that provides control structuring and excellent reproducibility in the fabrication of 3D Pt electrodes with different sizes and shapes. The ability to combine “drill” and “fill” in a single technique ...
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    Reproducible fabrication of three-dimensional (3D) metal electrodes is essential for accurate measurements of analyte in the fields of electroanalytical chemistry and biosensor development. Unfortunately, fabrication of these types of electrodes is complicated by the inherent complexity of current nano-fabrication methodologies. Herein, we report a simple and rapid fabrication method referred to as “drill and fill” lithography that provides control structuring and excellent reproducibility in the fabrication of 3D Pt electrodes with different sizes and shapes. The ability to combine “drill” and “fill” in a single technique using focused ion beam (FIB) lithography enabled precise control of the size and shape of the electrode depending on the amount of deposited metallic Pt. Electrodes were characterized using scanning electron microscopy, cyclic voltammetry, and Faradaic electrochemical impedance spectroscopy. The key innovation of this methodology lies in its simplicity and ability to tune the operating parameters to obtain electrodes of designated size and shapes. We envisage that these electrodes could be ideal for ‘on-chip’ diagnostic platforms.
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    Journal Title
    Sensors and Actuators, B: Chemical
    Volume
    185
    DOI
    https://doi.org/10.1016/j.snb.2013.05.040
    Subject
    Atomic, molecular and optical physics
    Analytical chemistry
    Analytical chemistry not elsewhere classified
    Materials engineering
    Publication URI
    http://hdl.handle.net/10072/172448
    Collection
    • Journal articles

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