Free-energy coarse-grained potential for C60

Area of Science:

• Computational chemistry
• Materials science
• Statistical mechanics

Background:

• Coarse-graining methods reduce computational cost for molecular simulations.
• Developing accurate coarse-grained potentials for complex molecules like C60 is challenging.
• Existing methods may not fully capture temperature-dependent behavior.

Purpose of the Study:

• To introduce a novel deformable free energy method for C60 coarse-graining.
• To generate temperature-dependent free-energy potentials.
• To validate the accuracy of the generated potentials against atomistic simulations.

Main Methods:

• Deformable free energy framework applied to C60.
• Generation of coarse-grained potentials.
• Comparison with fully atomistic molecular dynamics simulations.
• Fitting potentials to analytical forms at different temperatures.

Main Results:

• The proposed method successfully generates free-energy potentials for C60.
• The potentials show significant temperature dependence.
• Excellent agreement was achieved between coarse-grained and atomistic simulations.
• Analytical fit parameter sets are provided for practical use.

Conclusions:

• The deformable free energy method is effective for C60 coarse-graining.
• The generated potentials accurately represent C60 behavior across temperatures.
• This work provides valuable tools for simulating C60-based systems more efficiently.