Berlin 2005 – wissenschaftliches Programm

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CPP: Chemische Physik und Polymerphysik

CPP 29: POSTER: Polymer physics

CPP 29.27: Poster

Dienstag, 8. März 2005, 16:30–18:30, Poster TU D

Photoelectron spectroscopy and microscopy on magnetic nano particles embedded into block copolymers — •O. Seifarth¹, Y. Burkov¹, D. Schmeißer¹, A. Sydorenko², R. Kremek², and M. Stamm² — ¹Brandenburg Technical University, 03046 Cottbus, Konrad Wachsmann Allee 17 — ²Institut für Polymerforschung, 01069 Dresden, Hohe Strasse 6

The formation of metallic nano particles stored in thin films of block copolymers has been investigated by means of synchrotron radiation based photoemission spectroscopy (PES) and microscopy (PEEM). Empty channels in poly(styrene-block-4-vinylpyridine) copolymer with diameters of tens of nanometers filled with CrO₂, Cr₂O₃ and Ni provide ideal bases for performing electron spectroscopy with energy and lateral resolution on magnetic nano particles. We present UPS, XPS, NEXAFS spectra and PEEM images on and off the C 1s, Cr 2p, Ni 2p resonances and discuss the geometric and electronic structure of such compounds. The synchrotron radiation was delivered from the U49/2 beamline at BESSY II.