Berlin 2005 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

CPP: Chemische Physik und Polymerphysik

CPP 21: Nanoparticles

CPP 21.5: Vortrag

Dienstag, 8. März 2005, 10:45–11:00, TU C243

Thin films of titania nanoparticles via a sol/gel templated synthesis — •Jochen S. Gutmann, Zaicheng Sun, Yajun Cheng, and Dongha Kim — MPI for Polymer Research, Ackermannweg 10, 55128 Mainz

Amphiphilic block copolymers offer a way to mass fabricate thin, nanostructured organic/inorganic hybrid films. We have developed a simple route to generate Titania nanodot arrays from a sol/gel precursor via spin-coating. The resulting thin films show a dependence of particle size and order, on the preparation conditions of the precursor sol/gel/blockcopolymer mixture. As it is common for Titania synthesized via sol/gel techniques the initial nanodots are amorphous and may be converted into crystalline Titania modifications by thermal treatment. The implications of such treatment steps are studies with scanning electron and scanning force microscopy as well as grazing incidence small angel X-ray scattering. From these sets of experiments an optimum condition for structure formation is deduced and it’s use in photophysical application of the Titania nanodot arrays is discussed.