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    Light-Activated Electrochemistry for the Two-Dimensional Interrogation of Electroactive Regions on a Monolithic Surface with Dramatically Improved Spatial Resolution

    241620_241620.pdf (1.396Mb)
    Access Status
    Open access
    Authors
    Yang, Y.
    Ciampi, Simone
    Zhu, Y.
    Gooding, J.
    Date
    2016
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Yang, Y. and Ciampi, S. and Zhu, Y. and Gooding, J. 2016. Light-Activated Electrochemistry for the Two-Dimensional Interrogation of Electroactive Regions on a Monolithic Surface with Dramatically Improved Spatial Resolution. Journal of Physical Chemistry C. 120 (24): pp. 13032-13038.
    Source Title
    Journal of Physical Chemistry C
    DOI
    10.1021/acs.jpcc.6b02289
    ISSN
    1932-7447
    School
    Nanochemistry Research Institute
    Remarks

    This open access article is distributed under the Creative Commons license http://creativecommons.org/licenses/by-nc/4.0/

    URI
    http://hdl.handle.net/20.500.11937/33314
    Collection
    • Curtin Research Publications
    Abstract

    The concept of light-activated electrochemistry (LAE) was recently presented where faradaic electrochemistry could be spatially resolved on a monolithic silicon electrode by illuminating the specific region with light. A major implication from the previous study using illumination from the nonsolution side, or backside, is that the spatial resolution is limited by the finite thickness of silicon wafer. To overcome this restriction, and enable the further application of LAE, in combination with optical imaging for example, herein the spatial resolution of LAE using topside illumination (illumination from the solution side) is explored. The applied potential and irradiated light intensity are found to have significant effects on the spatial resolution. A spatial resolution of ~30 µm was achieved with optimal parameters, which is a 20 times improvement compared with the previously reported backside illumination design, demonstrating the potential application of the strategy including microarray patterning of silicon or for single cell analysis.

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