Nano World: Where towers construct themselves

Overall neutral IPCs do not assemble in the vicinity of a charged bottom wall which attract the patches (left), assemble into a close packed structure when the substrate is neutral (centre), and form open aggregates when the wall attract the equators (right). (Copyright: American Chemical Society/ACS 2014)
Overall neutral IPCs do not assemble in the vicinity of a charged bottom wall which attract the patches (left), assemble into a close packed structure when the substrate is neutral (centre), and form open aggregates when the wall attract the equators (right). (Copyright: American Chemical Society/ACS 2014)
Imagine a tower builds itself into the desired structure only by choosing the appropriate bricks.

Absurd – and however, in the nano world this is reality: There an unordered crowd of components can initiate the formation of an ordered structure – a process known as self-assembly. The physicists Christos Likos (University of Vienna), Emanuela Bianchi and Gerhard Kahl (both Vienna University of Technology) investigate how they can control the ordering of such self-assembling structures and found out how to switch the assembly process on and off.

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