Sonderforschungsbereich 481: Publikationen: Rapid transitions between distinct defect ...

Tsarkova, L.; Knoll, A.; Magerle, R.: Rapid transitions between distinct defect configuratrions in a block copolymer melt, Nano Letters, 6(7), 1574-1577 (2006), doi:10.1021/nl060825s [Link]

Abstract:
With in-situ scanning force microscopy we image the ordering of cylindrical microdomains in a thin film of a diblock copolymer melt. Tracking the evolution of individual defects reveals elementary steps of defect motion via interfacial undulations and repetitive transitions between distinct defect configurations on a time scale of tens of seconds. The velocity of these transitions suggests a cooperative movement of clusters of chains. The activation energy for the opening/closing of a connection between two cylinders is estimated.

Sonderforschungsbereich 481

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