![Computer image of a platinum nanocrystal and an octapod (right)](http://static.sciencelearn.org.nz/images/images/000/002/029/full/makeoctapod.jpg?1674167416)
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).
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).