Surface morphology of a modified ballistic deposition model
Kasturi Banerjee1, J Shamanna2, Subhankar Ray3
1B. N. S. Girls High School, Howrah 711 303, India and Department of Physics, University of Calcutta, Kolkata 700 009, India.
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|September 13, 2014
Summary
This study explores a modified ballistic deposition model, finding that particle stickiness impacts growth rate more than interparticle forces, but forces significantly influence deposit porosity.
Area of Science:
- Materials Science
- Surface Physics
- Computational Modeling
Background:
- Ballistic deposition models are crucial for understanding thin film growth.
- Existing models often simplify particle interactions and deposition rules.
- Investigating modified models provides deeper insights into surface and bulk properties.
Purpose of the Study:
- To investigate surface and bulk properties of a modified ballistic deposition model.
- To analyze the influence of particle stickiness and interparticle forces (Coulomb, van der Waals) on deposition.
- To characterize the growth dynamics and resulting deposit structures.
Main Methods:
- A modified ballistic deposition model interpolating between nearest-neighbor, next-nearest-neighbor, and random deposition.
- Simulation of particle deposition with controlled stickiness and interparticle forces.
- Analysis of interface width, growth rates, and deposit porosity.
Main Results:
- The interface width exhibits three distinct growth regions before saturation.
- Growth rate is more sensitive to the stickiness parameter than the type of interparticle force.
- Deposit porosity is significantly affected by the nature of the interparticle force.
Conclusions:
- Particle stickiness is a dominant factor in the kinetics of modified ballistic deposition.
- Interparticle forces play a critical role in determining the structural characteristics, specifically porosity, of the deposits.
- The modified model offers a more nuanced approach to simulating thin film formation.
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