The EPSRC nanotechnology image library

Image by Cvetelin Vasilev - University of Sheffield, UK

AFM of a thin film of a block copolymer - a molecule with a long section that can crystallise (polyethylene oxide), attached to a shorter length of a non-crystallisable material (poly-vinyl pyridine). What you can see is a crystal growing from a screw dislocation. The steps have a thickness of a single molecule folded up a few times.

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This work is licensed under a Creative Commons Attribution-No Derivative Works 3.0 License. All image post-treatments by Andy Eccleston.