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Tetrahexahedral (THH) gold nanocrystals bound to 24 high-index facets were synthesized through a facile colloidal chemistry by reducing HAuCl 4 in the mixture solution of N, N -dimethylformamide and poly(vinylpyrrolidone) at 80 °C. As-synthesized THH gold nanocrystals with O h symmetry were single-crystals, mainly bound to 24 high-index {210} facets. The controlled slow reaction condition made the rhombic dodecahedral gold nanocrystals transform to THH gold nanocrystals with high-index facets.
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Kim et al. (2010) studied this question.
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