Cover Picture: Muscle-like Supramolecular Polymers: Integrated Motion from Thousands of Molecular Machines (Angew. Chem. Int. Ed. 50/2012)



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Artificial muscles can be created by using a bottom-up approach that involves coupling the controlled motions of a very high number of molecular machines. The cover picture shows a muscular fiber from which a single-chain supramolecular polymer made of thousands of telescopic rotaxanes emerges. In their Communication on page 12504 ff., N. Giuseppone and co-workers show how the integrated functioning of these rotaxanes results in amplified motion. (Graphics by Mathieu Lejeune.)