Fig. 1. Examples of 3D multi-tori mesostructures.

(A) Protocol followed to prepare the multi-tori mesostructures. (B to E) Representative SEM micrographs of spherical hollow mesostructures consisting of a network of toroids. The structures were obtained by the self-assembly of PFS₂₆-b-PS₃₀₆ in a mixture of 1.02 ml of acetone/decane (25/75, v/v%), containing 20 μl of PFS₅₅-b-PI₅₀₀ core-crystalline elongated micelles (c = 0.2 mg ml⁻¹), and preheated at 35°C. An aliquot of PFS₂₆-b-PS₃₀₆ dissolved in THF (8 μl, c = 10 mg ml⁻¹) was then injected, and the solution was annealed for 1 hour at 35°C and cooled to room temperature; TEM grids were prepared within 1 hour after heating. Scale bars, 10 μm (B to D) and 2 μm (E).