(605e) Isolation of Competing Patterns during Electrodeposition: Experiments Vs Theory

Nonlinear interactions obscure the dominant wavelength in the instability pattern of diffusion-limited systems. The design of a microfluidic cell that mitigates nonlinear effects is presented, enabling enhanced diffusional effects and quasi-1D electrodeposition of patterns on the cathode. Although multiple wavelengths, including harmonics, were observed in the pattern, a custom, directed filter was applied across the spectrum to identify noise and select the dominant wavelength from the pattern. The dominant wavelength of nearly all experiments was within 5% of the theoretical wavelength, and 2/3 were within 1%.

This work was partially supported by grants from the National Science Foundation NSF-DMR-2004527 and Center for the Advancement of Science in Space (CASIS) AWD01608. The authors also acknowledge financial support from the University of Florida Space Research Initiative, a Dow Chemical Company Foundation Professorship for Kirk J. Ziegler, and the William P. and Tracy Cirioli Professorship for Ranga Narayanan.