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Modelling the atomic arrangement of amorphous 2D silica: a network analysis
Projesh Kumar Roy1, Markus Heyde, Andreas Heuer
1NRW Graduate School of Chemistry, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany.
Physical Chemistry Chemical Physics : PCCP
|May 19, 2018
Summary
Simulations of two-dimensional silica glass reveal structural details. Molecular dynamics simulations closely match experimental findings on silica glass structure and ring stability.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Computational Chemistry
Background:
- The random network theory describes silica glass structure.
- Experimental discovery of semi two-dimensional silica glass provides new insights.
Purpose of the Study:
- To investigate the structure formation of silica in two dimensions.
- To compare simulation results with experimental data for validation.
Main Methods:
- Development of a two-body force field using a soft-core Yukawa potential.
- Molecular dynamics simulations to sample different silica glass configurations.
- Parameterization of the force field based on nearest-neighbor distances.
Main Results:
- Simulations show excellent agreement with experimental data for silica glass structures.
- Analysis of angle distributions, ring sizes, and ring triplets aligns with experimental observations.
- Detailed insight into the spatial correlation and stability of rings of varying sizes.
Conclusions:
- The employed force field accurately reproduces experimental silica glass structures.
- Molecular dynamics simulations are a reliable tool for studying silica glass.
- The study enhances understanding of silica glass network formation and stability.
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