| abstract |
Hybrid microparticles comprising a polymer core and a shell at least partially surrounding the polymer core, the shell comprising a silica layer; characterized by an RF value, wherein the RF value is defined as reachable for adsorption of nitrogen gas The quotient of the external surface area of , and the surface area obtainable from the arithmetic mean diameter of the mixed-type microparticles, understood as ideal spheres, wherein the shell has a structure selected from the group consisting of closed, smooth and the shell has RF value between 1 and 1.5; closed, undulating and the shell has an RF value between 1.51 and 3; or open and the shell has an RF value greater than 3.01. |