The present invention provides a method for enhancing the delivery of nucleic acid molecules to cells by increasing the concentration of cells at the cell surface. The method comprises the step of premixing of nucleic acid:vector molecules with nanoparticles that are biocompatible, reversibly associate...http://www.google.de/patents/US6319715?utm_source=gb-gplus-sharePatent US6319715 - Method of enhancing the delivery of nucleic acids using silica nanoparticles