Dresden 2003 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 22: POSTER C
CPP 22.8: Poster
Donnerstag, 27. März 2003, 12:00–14:00, ZEU/250
Particle Track Etched Polyimide Membranes — •Nadja Hermsdorf1, K. Sahre1, E. Ferain2, and M. Stamm1 — 1IPF Dresden e.V. Hohe Strasse 6 01069 Dresden — 2Unite de Physique et de Chimie, Universite Louvain, Croix du Sud. 1, 1348 Louvain-la-Neuve (Belgium)
The fabrication of micro- or nanomaterials has interesting fundamental properties and becomes an integral part of devices for specific applications which requires appropriate techniques or methods. One of them, called template-based method consisting in the filling of a host porous medium with one or many desired materials, is now commonly used for the synthesis of polymeric or metallic micro- or nanomaterials in wires or tubules shape.Track etched templates present several advantages partially linked to their realisation process. This two-step process consists in an irradiation of a polymer layer by energetic heavy ions creating linear damage tracks, followed by a chemical etching of these tracks to pores.
We investigated polyimide films on silicon substrates with very good adhesion and a smooth surface. Pore size and pore density can be controlled and pores down to 15nm can be observed. Virgin and Xe-irradiated/etched PI layers were measured by ellipsometry, from which the thickness of the layers were determined. From grazing incidence small x-ray angle scattering experiments the dominant length scales in the sample surface (topography) or inside the nanostructure are accessible. This proves the existence of nanopores. The shape of the pores is cylindrical which was obtained from SEM measurements. For these investigations the pores have been filled with polypyrrole and the membrane was then removed which results in cylindrical nanowires.