Strukturbildung und optische Eigenschaften von Hybrid-Nanomaterialien synthetisiert via Miniemulsionspolymerisation
Auch gedruckt in der BibliothekZ: J-H 14.129; W: W-H 12.592
FakultätenFakultät für Naturwissenschaften
LizenzStandard (Fassung vom 01.10.2008)
The versatility of the miniemulsion technique for the synthesis of hybrid-nanomaterials with different properties is presented. By using this process it is possible to prepare structured metal-containing hybrid-nanomaterials. The formation of lamellar structures is based on an interaction between free coordination sites or hollows of the metal-complex and coordinating anionic surfactants, takes place in the monomer droplets of the miniemulsion and leads to self-assembly of alternating metal-complex and surfactant bilayer. The morphology and the layer distance of the structured nanomaterials can be adjusted by the type and the chain length of the anionic surfactant. Moreover the polymeric matrix influences the mechanical properties of the metal-based nanostructures. Furthermore, it was shown that the miniemulsion polymerization enables the homogeneous distribution of hydrophobic, oligonuclear lanthanide clusters in different polymeric matrices, the protection against quenching in water and the retention of their optical properties. The resulting water-based hybrid-nanomterials give the powderous lanthanide clusters new properties and further possibilities for their applications like luminescent polymer films. Besides metal-complexes and lanthanide clusters, the fluorescent dye PMI was also embedded via miniemulsion polymerization in various polymethacrylates in the context of this work. The dye PMI was used as a marker in order to investigate the cellular uptake of different polymethacrylates in various cell lines. The aim was to adjust the properties of the polymethacrylate nanoparticles by changing the length and the structure of the hydrocarbon chain in the ester group and to investigate the influence of these changes on the cellular uptake. It was observed that hydrophobicity and softness of the polymethacrylates promote their cellular uptake in different cell lines.
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