By size-selective precipitation homodimeric CdSe nanocrystals could be isolated from a mixture of oligomers formed when monodisperse CdSe nanocrystals (see right) were linked by the bifunctional organic ligand, bis(acyl hydrazide). TEM images revealed a reproducible separation between CdSe particles of approximately a quarter of the particle diameter. This distance is consistent with the physical dimensions of the linker.
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