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Differential Image Contrast (DIC) photographs of spirals on the (001) surfaces of two graphite crystals. Note the regularity of 120-degree "notches" near the corners of the macrospiral steps, and in a few places, 60-degree notches at the edges of the steps. John A. Jaszczak collection and photo. |
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Atomic Force Microscope (AFM) image of growth hillocks and curious 120-degree and 60-degree "notches" near the edges and corners of macrospiral steps. John Rakovan collection and photo. |
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. AFM images of fundamental screw-dislocation-generated growth spirals which occur on the growth hillocks above. 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. John Rakovan collection and photo. |
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| Click on image above to find out: What does it all mean? |
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