Fig. 2: TEM images of the DMAUiO synthesized with different P123/F127/toluene ratio.

TEM images of DMAUiO synthesized with P123/F127 mass ratio of 1:2 (a–c), 7:8 (d–f), 2:1 (g–i), 4:1 (j–l) and toluene of 60 μL (a, d, g, j), 80 μL (b, e, h, k), and 100 μL (c, f, i, l), respectively. The rightmost panel illustrates the schematic 3D models of the DMAUiO synthesized with different P123/F127/toluene ratio.