  We investigate the effect of the size of nanoparticles on the behaviour of
equilibrium polymers (Wormlike micelles) and nanoparticle system. The
self-organised structures of nanoparticles in the system show a morphological
change from percolating networks to non-percolating clusters with an increase
in the minimum approaching distance (EVP-excluded volume parameter) between
nanoparticles and the equilibrium polymers. The shape of the nanoparticle
clusters (nanorods, nanosheets, etc.) depends on the density of the polymer
matrix, irrespective of the size of nanoparticles. We show that with an
increase in the nanoparticle size, the value of EVP at which the nanoparticle
structure undergoes the morphological change shifts to lower values. We also
report that with the increase in nanoparticle size, the packing of
nanoparticles decreases. Hence, they do not form a well-defined structure with
nanoparticles of bigger size. This decrease in the packing is due to the
decrease in the surface to volume ratio which in turn decreases the surface
interactions.
