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Effects of orientational order on modulated cylindrical interfaces.

Jason Klebes1,2, Paul Clegg2, R M L Evans1

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Summary

Orientational order in cylindrical interfaces can induce shape modulations, leading to banded patterns. These modulated cylinders exhibit defect-free (Type I) or defect-rich (Type II) states, influencing their morphology.

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Area of Science:

  • Soft Matter Physics
  • Materials Science
  • Biophysics

Background:

  • Cylindrical interfaces, found in emulsions and lipid tubules, can exhibit orientational order similar to spherical systems.
  • The interplay between orientational order and shape modulations in cylindrical interfaces is not fully understood.

Purpose of the Study:

  • To investigate how orientational order influences and induces shape modulations in cylindrical interfaces.
  • To predict the low-temperature morphologies of modulated cylindrical interfaces with orientational order.

Main Methods:

  • Analytical examination of system equilibrium energetics.
  • Lattice-based Markov chain Monte Carlo simulations.

Main Results:

  • Shape modulation leads to banded patterns of alternating isotropic and ordered interfacial material.
  • Cylindrical systems are classified into Type I (defect-free) and Type II (defect-rich, up to 4n excess defects).
  • The transition from unmodulated to modulated cylinders can be continuous or discontinuous.

Conclusions:

  • Orientational order significantly impacts the shape and morphology of cylindrical interfaces.
  • The presence and number of defects play a crucial role in determining the behavior of modulated cylinders.
  • Predicts distinct low-temperature morphologies for modulated cylindrical interfaces based on defect presence.