Equidistant band formation of precipitation in a reaction-diffusion process

Details Equidistant band formation of precipitation in a reaction-diffusion process Equidistant band formation of precipitation in a reaction-diffusion process

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010njph...12b3009j&link_type=abstract

New Journal of Physics, Volume 12, Issue 2, pp. 023009 (2010).

Physics

Scientific paper

We study precipitation patterns occurring in diffusion-limited reactions, focusing on Liesegang bands. Naturally, these patterns are non-equidistantly spaced, and thus less useful for bottom-up material design. However, we show how a continuous large-scale modification of the inhomogeneity of the substrate and/or the nucleation threshold can be used to obtain equidistantly spaced bands on small length scales. We confirm our suggestions by lattice-gas simulations and propose an iterative experimental procedure not requiring a priori knowledge of parameters. We discuss the feasibility for glass substrates modified by irradiation with femtosecond laser pulses.

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