Conformation and dynamics of partially active linear polymers.

Area of Science:

• Polymer Physics
• Biophysics
• Statistical Mechanics

Background:

• Active polymers are systems with self-propelled components, crucial in biophysical processes.
• Understanding their non-equilibrium dynamics is key to modeling biological systems.

Purpose of the Study:

• To investigate how the spatial arrangement of active monomers affects polymer conformation and dynamics.
• To explore methods for controlling polymer diffusion by modulating activity distribution.

Main Methods:

• Numerical simulations of isolated polymers with a fraction of active monomers.
• Analysis of conformational properties and dynamical behavior, including diffusion coefficients.
• Systematic variation of the active block's position along the polymer chain.

Main Results:

• The position of a contiguous active block significantly influences polymer conformation and dynamics.
• Diffusion coefficients can be tuned from active-like to passive-like by repositioning the active block.
• Modified self-propulsion rules can enhance diffusion even with reduced overall activity.

Conclusions:

• The spatial organization of activity is a critical factor in the behavior of partially active polymers.
• This work provides insights into controlling active polymer dynamics for biophysical modeling.
• Findings are relevant for understanding systems like filamentous bacteria and worms.