Nanopicture of the Day

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June 15, 2004

Graphite Spiral

Source:  John Rakovan

      References:

Rakovan & Jaszczak "Multiple length scale growth spirals on metamorphic graphite {001} surfaces studied by atomic force microscopy" American Mineralogist 87, 17-24 (2002).

Description:

This AFM image of a fundamental screw-dislocation-generated growth spiral in graphite which occurs on growth hillocks. Most of the step edges are 6.7 Angstroms high (graphite's unit cell height along [001]), corresponding to a "double step". Arrows point to 3.3 Angstrom steps, which correspond to a single [001] d-spacing.

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