Analysis of the dried sample revealed that the dimensions of the unit cell decreased, as expected (a, b, c = 16.36±0.26 nm; compare with a, b, c = 20.53 nm for an aqueous suspension of the same TTs, determined from SAXS). Interestingly, the collapse did not appreciably affect the shape of the primitive unit cell (α, β, γ = 89.9±1.1º vs. α, β, γ = 90º from SAXS), despite a significant volume loss of 49%. However, the NPs residing inside the unit cell were significantly disordered upon drying (Supplementary Section 5.2) and of the expected 35 particles per unit cell, we managed to resolve only 33. This finding is not unexpected; we note that evaporation of water and in particular removal of the trapped ions (NH4 + and CO3 2-; in the form of NH3 and CO2) unscreens the electrostatic interactions between the NPs; hence, the particles will tend to adjust their positions within the crystals so as to minimize the free energy originating from the unscreened interactions between the NPs.