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Radial Growth in 2D Revisited: The Effect of Finite Density, Binding Affinity, Reaction Rates, and Diffusion
Author(s) -
Bihr Timo,
Sadafi FabrizioZagros,
Seifert Udo,
Taylor Robin Klupp,
Smith AnaSunčana
Publication year - 2017
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201600310
Subject(s) - materials science , chemical physics , diffusion , fractal dimension , particle (ecology) , dendrite (mathematics) , colloid , surface diffusion , particle size , diffusion limited aggregation , nanotechnology , fractal , chemistry , thermodynamics , physics , mathematical analysis , oceanography , mathematics , geometry , adsorption , geology
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.