Fig. 1: Co-assembly.

a Concept: the unsymmetrical stickers constrain the relative orientation of the polymer arms. Co-assembly is favored over self-sorting for entropic and steric reasons, while the Janus organization is favored because it allows optimal matching of the hydrogen bonding units. b Structure of 4/8-PDMAc and 8/4-PNAM. c Cryo-TEM image of (4/8-PDMAc + 8/4-PNAM) equimolar mixture (1 g L−1 in water/DMSO (99/1 v/v)).