Computational study of solvated block-copolymer microphases

Using field-theoretic simulations, we study the equilibrium self-assembly of solvated block copolymer microphases with different chain architectures and block selectivities. Initially within the mean-field approximation (self-consistent field theory), we employ unit-cell calculations to determine the phase diagram by comparing the free energy of candidate phases. We find good agreement with prior computational and experimental reports in the literature. We subsequently move beyond the mean-field approximation using Complex Langevin sampling to investigate the effect of fluctuations on relative phase stabilities.