Publication: Multiparticle biased diffusion-limited aggregation with surface diffusion: a comprehensive model of electrodeposition
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ISSN: 1539-3755 (print version)
ISSN: 1550-2376 (online version)
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2000-07
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American Physical Society
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Abstract
We present a complete study of the multiparticle biased diffusion-limited aggregation ~MBDLA! model
supplemented with surface diffusion ~SD!, focusing on the relevance and effects of the latter transport mechanism.
By comparing different algorithms, we show that MBDLA 1 SD is a very good qualitative model for
electrodeposition in essentially the whole range of current intensities provided one introduces SD in the model
in the proper fashion. We have found that the correct procedure involves simultaneous bulk diffusion and SD,
introducing a time scale arising from the ratio of the rates of the two processes. We discuss in detail the
different morphologies obtained and compare them to the available experimental data with very satisfactory
results. We also characterize the aggregates thus obtained by means of the dynamic scaling exponents of the
interface height, allowing us to distinguish several regimes in the mentioned interface growth. Our asymptotic
scaling exponents are again in good agreement with recent experiments. We conclude by discussing a global
picture of the influence and consequences of SD in electrodeposition
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Physical Review E, vol. 62, n. 1, july 2000. Pp. 161–173