Early stages of ramified growth in quasi-two-dimensional electrochemical deposition

Details Early stages of ramified growth in quasi-two-dimensional electrochemical deposition Early stages of ramified growth in quasi-two-dimensional electrochemical deposition

1995-12-22

arxiv.org/abs/patt-sol/9512003v1

Nonlinear Sciences

Pattern Formation and Solitons

REVTeX, four ps figures

Scientific paper

10.1103/PhysRevE.53.R5561

I have measured the early stages of the growth of branched metal aggregates formed by electrochemical deposition in very thin layers. The growth rate of spatial Fourier modes is described qualitatively by the results of a linear stability analysis [D.P. Barkey, R.H. Muller, and C.W. Tobias, J. Electrochem. Soc. {\bf 136}, 2207 (1989)]. The maximum growth rate is proportional to $(I/c)^\delta$ where $I$ is the current through the electrochemical cell, $c$ the electrolyte concentration, and $\delta = 1.37 \pm 0.08$. Differences between my results and the theoretical predictions suggest that electroconvection in the electrolyte has a large influence on the instability leading to ramified growth.

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