Thin film growth by 3D multi-particle diffusion limited aggregation model: Anomalous roughening and fractal analysis

Maryam Nasehnejad, G. Nabiyouni and Mehran Gholipour Shahraki

Physica A: Statistical Mechanics and its Applications, 2018, vol. 493, issue C, 135-147

Abstract: In this study a 3D multi-particle diffusion limited aggregation method is employed to simulate growth of rough surfaces with fractal behavior in electrodeposition process. A deposition model is used in which the radial motion of the particles with probability P, competes with random motions with probability 1−P. Thin films growth is simulated for different values of probability P (related to the electric field) and thickness of the layer(related to the number of deposited particles). The influence of these parameters on morphology, kinetic of roughening and the fractal dimension of the simulated surfaces has been investigated. The results show that the surface roughness increases with increasing the deposition time and scaling exponents exhibit a complex behavior which is called as anomalous scaling. It seems that in electrodeposition process, radial motion of the particles toward the growing seeds may be an important mechanism leading to anomalous scaling.

Keywords: Electrodeposition; Multi-particle diffusion limited aggregation (DLA) model; Surface roughness; Fractal dimension; Anomalous scaling (search for similar items in EconPapers)
Date: 2018
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:493:y:2018:i:c:p:135-147

DOI: 10.1016/j.physa.2017.09.099

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