Alternating copolymers consisting of phenyl-capped bithiophene (red units) and oligo(ethylene glycol) hierarchically self-assemble into nanosheets through polymer folding in some organic solvents. The lateral size of the nanosheet is controllable by temperature and concentration of the solution. The nanosheet surface can be chemically modified by using copper-catalyzed Huisgen cycloaddition without disrupting the nanosheet structure.
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