Vesicles made from amphiphilic copolymers are disclosed. The amphiphilic
copolymers can be ABA copolymers, where one of A and B is hydrophilic and the other
is hydrophobic. AB copolymers can also be used. The copolymers may be crosslinked
to form nanocapsules. Crosslinking can be accomplished using a variety of methods,
including end to end polymerization of copolymers having terminal unsaturated groups.
Molecules, such as membrane proteins, can be incorporated into the wall of the
vesicles or nanocapsules.