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  • Computer image of a platinum nanocrystal and an octapod (right)
    Rights: Dr Richard Tilley Published 30 May 2008 Size: 150 KB Referencing Hub media

    On the left is a computer image of a platinum nanocrystal. Each ‘dot’ is an atom. When a surfactant is used to block the square faces, only the triangular faces can grow, and the result is an octapod (right).

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