Perfectly faceted tetrahedral 3D superlattice crystals, which are built up of 3.5-nm Ag2S crystals, have been directly prepared through a simple one-step, two-phase reaction. The as-prepared nanocrystals assemble at the interface of water and dodecanethiol phases to form superlattice films, then break into triangular flakes, and finally stack to form tetrahedra; inset of TEM image: fast Fourier transform pattern of the superlattice (SL).
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Zhuang et al. (2007) studied this question.
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