Radial Growth in 2D Revisited: The Effect of Finite Density, Binding Affinity, Reaction Rates, and Diffusion

Authors

  • Timo Bihr,

    1. Cluster of Excellence: Engineering of Advanced Materials, Friedrich-Alexander-University of Erlangen-Nürnberg, Erlangen, Germany
    2. PULS Group, Institute for Theoretical Physics, Friedrich-Alexander-University of Erlangen-Nürnberg, Erlangen, Germany
    3. II. Institut für Theoretische Physik, Universität Stuttgart, Stuttgart, Germany
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  • Fabrizio-Zagros Sadafi,

    1. Cluster of Excellence: Engineering of Advanced Materials, Friedrich-Alexander-University of Erlangen-Nürnberg, Erlangen, Germany
    2. Institute of Particle Technology, Friedrich-Alexander-University of Erlangen-Nürnberg, Erlangen, Germany
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  • Udo Seifert,

    1. II. Institut für Theoretische Physik, Universität Stuttgart, Stuttgart, Germany
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  • Robin Klupp Taylor,

    1. Cluster of Excellence: Engineering of Advanced Materials, Friedrich-Alexander-University of Erlangen-Nürnberg, Erlangen, Germany
    2. Institute of Particle Technology, Friedrich-Alexander-University of Erlangen-Nürnberg, Erlangen, Germany
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  • Ana-Sunčana Smith

    Corresponding author
    1. Cluster of Excellence: Engineering of Advanced Materials, Friedrich-Alexander-University of Erlangen-Nürnberg, Erlangen, Germany
    2. Institute Ruder Bošković, Division of Physical Chemistry, Zagreb, Croatia
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Abstract

Dendrite growth of metal patches on colloidal particles shows a variety of structures depending on the preparation conditions. The morphology of these patches suggests a cross-over from a reaction to a diffusion limited growth, implicating diffusion on the particle surface. Interestingly, the morphological and optical characteristics of the patches continuously change between two limiting behaviors. To understand this growth process, extensive simulations are performed, studying the fractal dimension and the dynamics of growth of a patch on a particle of a finite size, as a function of the initial density and the binding affinity of diffusing tracers. Several important growth regimes are characterized that enable to optimize the pathway for the synthesis of optically active, patchy particles.

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