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Back and forth: Enzymatic, reversible polymerization on gold surfaces was efficiently carried out from surface ‐ tethered self ‐ priming oligodeoxynucleotides in a sequence ‐ specific fashion by using two kinds of enzymes. Taq DNA polymerase, acting as a catalyst, facilitated DNA polymerization, and DNA restriction enzymes cut DNA polymers from the surface. [ABSTRACT FROM AUTHOR]

Reversible polymerization has a great potential for the generation of reusable nanomaterials and complete repair of cracks or breaks in self ‐ healing materials. In their Communication on page 908   ff., Young Hwan Jung et   al. report on a surface ‐ initiated, reversible polymerization of DNA that is processed by enzymatic reactions. Elongation of DNA, catalyzed by Taq DNA polymerase, is performed from a self ‐ priming oligodeoxynucleotide anchored onto gold, and reversible de ‐ polymerization and re ‐ polymerization are achieved in a sequence ‐ specific manner by using a restriction enzyme and Taq DNA polymerase. The cover picture was designed by Juno Lee. [ABSTRACT FROM AUTHOR]