  Polymeric micelles are used in a variety of applications, with the micelle's
shape often playing an important role. Consequently, a scheme to design
micelles of arbitrary shape is desirable. In this paper, we consider micelles
formed from a single, linear, multiblock copolymer, and we study how easily the
micelle's shape can be controlled by altering the copolymer block lengths.
Using a rational design scheme, we identify a few aspects of the multiblock
composition that are expected to have a well-behaved, predictable effect on
micelle shape. Starting from a reference micelle composition, itself already
exhibiting a nonstandard shape having a moderately sized dimple, we alter these
aspects of the multiblock composition and observe the regularity of the micelle
shape response. The response of the shape is found to be somewhat smooth, but
significantly nonlinear and sometimes nonmonotonic, suggesting that
sophisticated techniques may be required to aid in micelle design.
