title: Selective binding of dye molecules and CdSe nanocrystals on nanostructures generated by AFM lithography of silicon surfaces.
abstract: Anchoring optically active molecules or semiconductor nanocrystals on nanostructured surfaces is one of the first steps for building complex structures with variable properties and functions. Electrostatic interactions have been used for selective binding of cationic molecular species on lithographically generated and negatively charged nanostructures. Semiconductor nanocrystals, covered by amphiphilic molecules, have been bound via hydrophobic interactions. Selective binding of cationic Rhodamin 6G molecules to freshly prepared silicon oxide nanostructures as well as the CdSe/ZnS nanocrystals to the surrounding hydrophobic alkyl monolayer could be identified both by optical methods and by atomic force microscopy. The adsorption of CdSe/ZnS nanoparticles was accompanied by self-organization phenomena of the surfactant tri octyl phosphine oxide (TOPO).
authors: Center of Nanostructured Materials and Analytics (NanoMA), Institute of Physics, University of Technology Chemnitz, D-09111 Chemnitz, Germany.
authors: Harald
authors: H
authors: Graaf
authors: Maik
authors: M
authors: Vieluf
authors: Christian
authors: C
authors: von Borczyskowski