Figure 4.

Time-resolved formation of a two-dimensional hexagonal nano-structured silica material (SBA-15). (a) Evolution of the (10), (11), (20) and (21) Bragg peaks (powder pattern). (b) Density profile obtained by modeling these experimental data using a cylindrical core/shell model (higher electron density in black) [45]. (c) Two-dimensional electron density reconstruction (higher electron density in white) from reference [46]. The formation upon time of a dense silica wall in-between the cylindrical micelles is evidenced with both methods.