Abstract: The invention relates to the filling of hydrophobic or hydrophobically modified porous microparticles with hydrophobic substances with subsequent encapsulation of the resulting hydrophobic particles using layer-by-layer (LbL) polyelectrolyte technology for the purpose of preparing homogeneous suspensions in water, and also for the controlled release of the encapsulated active ingredients. Through a specific modification of the LbL surface it is possible to realize preferred adhesion at the target site.