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    Nanocrystal Inks: Photoelectrochemical Printing of Cu<inf>2</inf>O Nanocrystals on Silicon with 2D Control on Polyhedral Shapes

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    Fulltext not available
    Authors
    Vogel, Y.
    Gonçales, V.
    Al-Obaidi, L.
    Gooding, J.
    Darwish, Nadim
    Ciampi, Simone
    Date
    2018
    Type
    Journal Article
    
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    Abstract

    © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Here, a printing technology is reported that enables the functionalization of photoconducting materials with an arbitrary user-defined pattern of nanocrystals. Two sets of information can be encoded into the same unit area; control over the polyhedral shape of individual nanocrystals and high lateral resolution (micrometer scale) for large 2D patterns (millimeter scale) of Cu2O that were grown over unstructured amorphous silicon. The key to this new technology is a parallel modulation of both the electrode kinetics at the silicon/electrolyte interface and the light-assisted control of adsorption of halide ions on the growing Cu2O particles. This is achieved using local pixelation of a visible light stimulus by adapting to the field of photoelectrochemistry spatial light modulation more often used in super resolution microscopy. Any user-defined pattern (i.e., any arbitrary bitmap image file or a sequence of images) is converted within seconds into an array of nanoparticles. The process does not rely on the use of physical masks or chemical templating and it is parallel, meaning, for example, that it is possible to guide the exclusive growth of cubic nanoparticles in an area defined at will by the operator, while the neighboring section(s) are being covered exclusively by octahedrons.

    Citation
    Vogel, Y. and Gonçales, V. and Al-Obaidi, L. and Gooding, J. and Darwish, N. and Ciampi, S. 2018. Nanocrystal Inks: Photoelectrochemical Printing of Cu<inf>2</inf>O Nanocrystals on Silicon with 2D Control on Polyhedral Shapes. Advanced Functional Materials.
    Source Title
    Advanced Functional Materials
    DOI
    10.1002/adfm.201804791
    ISSN
    1616-301X
    School
    Nanochemistry Research Institute
    URI
    http://hdl.handle.net/20.500.11937/71078
    Collection
    • Curtin Research Publications

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