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A new class of gold nanostructures, concave nanocubes, enclosed by 24 high-index 720 facets, have been prepared in a monodisperse fashion by a modified seed-mediated synthetic method. The Cl (-) counterion in the surfactant plays an essential role in controlling the concave morphology of the final product. The concave nanocubes exhibit higher chemical activities compared with low-index 111-faceted octahedra.
Zhang et al. (Mon,) studied this question.