  Conventional micelles, composed of simple amphiphiles, exhibit only a few
standard morphologies, each characterized by its mean surface curvature set by
the amphiphiles. Here we demonstrate a rational design scheme to construct
micelles of more general shape from polymeric amphiphiles. We replace the many
amphiphiles of a conventional micelle by a single flexible, linear, block
copolymer chain containing two incompatible species arranged in multiple
alternating segments. With suitable segment lengths, the chain exhibits a
condensed spherical configuration in solution, similar to conventional
micelles. Our design scheme posits that further shapes are attained by altering
the segment lengths. To assess the power of this scheme, we exhibit stable
micelles of horseshoe form using conventional bead-spring simulations in two
dimensions. Modest changes in the segment lengths produce smooth changes in the
micelle's shape and stability.
