Coarse-Grained Simulations Using a Multipolar Force Field Model.

Area of Science:

• Computational chemistry
• Materials science
• Nanotechnology

Background:

• Accurate molecular simulations are crucial for understanding material properties.
• Fullerenes exhibit complex intermolecular interactions that are challenging to model.
• Existing methods may lack efficiency or accuracy for large-scale fullerene systems.

Purpose of the Study:

• To develop and validate a coarse-grained molecular simulation method for fullerenes.
• To accurately capture the intermolecular interactions governing fullerene condensation.
• To provide an efficient and scalable simulation approach for fullerene systems.

Main Methods:

• Developed a coarse-grained molecular simulation based on a multipolar expansion method.
• Constructed transferable united atom potentials approximating atomistic interactions.
• Utilized ab initio calculations, empirical force fields, and experimental data.
• Implemented a parallel algorithm for efficient computation of molecular interactions.

Main Results:

• The multipolar expansion method accurately models fullerene condensation mechanisms.
• Coarse-grained potentials approach all-atom potentials with increasing expansion order.
• Simulations show excellent agreement with benchmark fully atomistic molecular dynamics.
• Efficient computation of potentials using few interaction moment tensors.

Conclusions:

• The developed coarse-grained method offers an efficient and accurate approach for simulating fullerenes.
• This method provides insights into fullerene condensation processes.
• The technique is scalable and suitable for large-scale molecular dynamics simulations.