  Simulations and experiments of nanorods (NRs) show that co-assembly with
block copolymer (BCP) melts leads to the formation of a superstructure of
side-to-side NRs perpendicular to the lamellar axis. A mesoscopic model is
validated against scanning electron microscopy (SEM) images of CdSe NRs mixed
with polystyrene-block-poly(methyl methacrylate). It is then used to study the
co-assembly of anisotropic nanoparticles (NPs) with a length in the same order
of magnitude as the lamellar spacing. The phase diagram of BCP/NP is explored
as well as the time evolution of the NR. NRs that are slightly larger than the
lamellar spacing are found to rotate and organise side-to-side with a tilted
orientation with respect to the interface. Strongly interacting NPs are found
to dominate the co-assembly while weakly interacting nanoparticles are less
prone to form aggregates and tend to form well-ordered configurations.
