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![[Figure 8]](rw5037fig8mag.jpg)
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Figure 8
Example of evaluating lattice symmetries in cases of extreme disorder. The black dots are experimental SAXS data obtained for a binary lattice of Au and CdTe nanoparticles, using a DNA linker length and an annealing protocol where the overall structural ordering is weak. The blue curves show theoretical scattering for candidate lattices that match the 1:1 particle stoichiometry: an alternating body-centered cubic (`BCC') lattice where the two nanoparticle types occupy opposite sites (e.g. Au on corners of unit cell, CdTe in center); a simple cubic lattice where particle type alternates (`SC'); and a diamond lattice (`Diamond') where sites alternate between particle type (e.g. Au forms a face-centered cubic lattice, with CdTe forming a shifted face-centered cube). Schematics of the three lattices are shown in the right column. The lattice spacing was varied between the three simulations (so as to match the primary peak position); all other simulation parameters were held constant. Although the experimental data have only a few broad peaks, it is possible to determine which lattices are consistent with experiment (in this case, the b.c.c. lattice). |
![[Figure 8]](rw5037fig8.jpg)
 | JOURNAL OF APPLIED CRYSTALLOGRAPHY |
ISSN: 1600-5767
