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Issue 39, 2016
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Fractal growth of platinum electrodeposits revealed by in situ electron microscopy

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Abstract

Fractals are commonly observed in nature and elucidating the mechanisms of fractal-related growth is a compelling issue for both fundamental science and technology. Here we report an in situ electron microscopy study of dynamic fractal growth of platinum during electrodeposition in a miniaturized electrochemical cell at varying growth conditions. Highly dendritic growth – either dense branching or ramified islands – are formed at the solid-electrolyte interface. We show how the diffusion length of ions in the electrolyte influences morphology selection and how instability induced by initial surface roughness, combined with local enhancement of electric field, gives rise to non-uniform branched deposition as a result of nucleation/growth at preferred locations. Comparing the growth behavior under these different conditions provides new insight into the fundamental mechanisms of platinum nucleation.

Graphical abstract: Fractal growth of platinum electrodeposits revealed by in situ electron microscopy

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Publication details

The article was received on 28 Jun 2016, accepted on 15 Sep 2016 and first published on 16 Sep 2016


Article type: Paper
DOI: 10.1039/C6NR05167G
Citation: Nanoscale, 2016,8, 17250-17255
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    Fractal growth of platinum electrodeposits revealed by in situ electron microscopy

    L. Wang, J. Wen, H. Sheng and D. J. Miller, Nanoscale, 2016, 8, 17250
    DOI: 10.1039/C6NR05167G

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