Work

Pattern Selection in Three-Precipitate Liesegang Systems

Year: 2024

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide Liesegang patterns present a display of parallel stripes of precipitate that arise from the interdiffusion of coprecipitate ions in a gel medium. The bands observed in rocks are typical analogies of this phenomenon, and their composition is not restricted to the banded deposition of a single mineral. We here extend the study to a three-precipitate system, wherein Co 2+, Ni 2+, and Cd 2+ cations are precipitated by the same anion (OH – from NH 4 OH) to form Co(OH) 2, Ni(OH) 2, and Cd(OH) 2, respectively. The resulting pattern exhibits an alternation of compact mixed Co(OH) 2 and Ni(OH) 2 bands with granules of pure Cd(OH) 2 between them. The obtained pattern confirms the generic type of ( A + B )/ C /( A + B )/ C /( A + B )/ C alternation conjectured analytically using the competitive particle growth (CPG) model and stability analysis.

Source: ACS Omega

DOI: 10.1021/acsomega.4c05735

Authors: Tamar Kanimian, Pamela Nasr, Rabih Sultan

Institutions: American University of Beirut, Cornell University

Language: English

Topic: Nonlinear Dynamics and Pattern Formation

Subfield: Computer Networks and Communications

Field: Computer Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,935

Funder: University Research Board, American University of Beirut