Secondary nucleation in symmetric binary SALR mixtures

Area of Science:

• Physical Chemistry
• Computational Fluid Dynamics
• Biophysics

Background:

• Previous research indicated secondary nucleation in pure short-range (SA) and long-range (LR) interaction (SALR) fluids under slow concentration increase.
• Understanding cluster formation is crucial for modeling complex systems like the intra-cellular environment.

Purpose of the Study:

• To investigate secondary nucleation and cluster fissioning in a symmetric binary SALR fluid model.
• To explore how tunable cross-interactions influence cluster structure in binary SALR mixtures.
• To establish a foundational model for simulating biological systems, including membraneless organelles and early life chemistry.

Main Methods:

• Utilized Monte Carlo simulations to model the behavior of giant clusters.
• Employed a symmetric binary fluid model with competing SA and LR interactions.
• Varied cross-interaction parameters to control cluster formation.

Main Results:

• Confirmed secondary nucleation in a symmetric binary SALR mixture, consistent with prior findings in pure SALR fluids.
• Demonstrated the ability to generate three distinct cluster structures by tuning cross-interactions: independent, contact, and mixed clusters.
• Maintained identical overall concentrations for each component across all tested configurations.

Conclusions:

• The study validates secondary nucleation in binary SALR mixtures, expanding on previous work.
• Tunable cross-interactions offer control over cluster morphology, enabling diverse structural outcomes.
• This binary model serves as a stepping stone for more complex SALR fluid applications in biophysical modeling.