  At low temperatures, colloidal particles with short-range attractive and
long-range repulsive interactions can form various periodic microphases in
bulk.In this paper, we investigate the self-assembly behaviour of colloids with
competing interactions under spherical confinement by conducting molecular
dynamics simulations. We find that the cluster, mixture, cylindrical,
perforated lamellar and lamellar structures can be obtained, but the details of
the ordered structures are different from those in bulk systems. Interestingly,
the system tends to form more perforated structures when confined in smaller
spheres. The mechanism behind this phenomenon is the relationship between the
energy of the ordered structures and the bending of the confinement wall, which
is different from the mechanism in copolymer systems.
