11671_2013_1764_MOESM1_ESM.doc Additional file 1: Three crystal structure models of CuGaS2 and an XRD pattern of an intermediate sample.
Sample B is an intermediate sample, and the STEM characterization yields an elemental distribution in between A and C (not shown here).
The inconsistency among structures of later state intermediates might be due to differences in the preparation of the intermediate sample as well as in processing the data from the ground state.
This early intermediate sample contained relatively low levels of S5 and S3 and significantly depleted levels of S2 and S12.
The intermediate sample was a mixture of totally exchanged WZ InP nanocrystals and of partially exchanged Cu3- x P/InP heterostructures.
Although this method is formally exact we note that noise estimators may be strongly biased for small to intermediate sample sizes [ 24].
This situation is highly suggestive of successful superinfection (strain replacement), with the high DBC count intermediate sample representing a transitory stage when a mixture of both strains was present.
A weaker NIR absorption in the intermediate sample (blue curve in Figure 4e), with a maximum still at about 1500 nm, most likely arose from the residual Cu3- x P domains in the partially exchanged heterostructures.
