Silkworm cocoons by cylinders self-assembled from H-shaped alternating polymer brushes

We report a novel silkworm cocoon-like nanostructure based on the 3D hierarchical self-assembly of cylinders which are spontaneously formed by an H-shaped polymer brush comprising a disulfide-bridged spacer and two brushes with alternating PEG and PCL side chains. Crystalline of PCL between adjacent cylinders bridges cylinders.