Figure 1: Schematic design for multigeometry nanoparticle construction.

Single block copolymers possess (a) specific molecular geometries based on relative length of block and solvophilicity/solvophobicity of the respective blocks. The individual block copolymers can assemble into (b) bilayer membranes (for example, vesicles), cylinders or spheres, through desired solution assembly. By taking advantage of molecular design and synthesis, varied block copolymers are assembled into diverse geometries at the same assembly condition. Herein, (c) multigeometry nanoparticles are achievable from co-assembly of selected mixtures of block copolymers in unlike molecular geometries, for example, cylinder-forming and bilayer-forming block copolymer mixture, or sphere-forming and bilayer-forming block copolymer mixture.