Fig. 3: Uniaxial living 2D CDSA of P2 unimer.
a TEM images of length and area-controlled 2D rectangles with U/S ratios of 2, 3, 5, 10, and 15. Numbers in the images indicate the average area (An) and dispersity (ĐA). Plots showing the linear dependence of b the area (An) and c the average length (Ln) in the (010) direction versus U/S ratios, demonstrating living 2D CDSA. Error bars indicate standard deviations (σ). d DLS profiles showing an increase in Dh from U/S ratio of 2–15 after three weeks of aging. e AFM images of the resulting 2D rectangles prepared from U/S ratios of 3, 10, and 15. A height profile of the 2D rectangles with U/S ratio of 15, demonstrating a height difference (7.8 nm of the newly formed 2D sheets versus 14.4 nm of the original 2D seeds). Much darker middle blocks in TEM images and brighter middle blocks in AFM images indicate the 2D seeds. f Schematic representation of the living 2D CDSA via uniaxial seeded growth along the (010) direction. The 2D schematic illustration of resulting 2D rectangles is based on the interdigitating slip-stack packing model of P2 homopolymer with the simplified structure in ab plane (see Supplementary Fig. 14 for detail)42.
