Fig. 6.

Size and Number of DNA-AuNP Aggregates as a Function of Time. In both the 1-component (FCC) (A) and 2-component (BCC) (B) systems, there is an initial rapid drop in the number of nanoparticle aggregates (red traces) immediately after combining the solutions. This coincides with a rapid increase in the average aggregate size (blue traces). Although the 1-component system reaches maximum aggregate size in ≈5 s, the 2-component system is still increasing in size after 15 s. Note that the number of aggregates in solution is a relative value, because the cross-sectional area of the X-ray beam does not allow simultaneous probing of the entire sample.