Dresden 2003 – wissenschaftliches Programm

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CPP: Chemische Physik und Polymerphysik

CPP 12: Strukturierte Polymeroberfl
ächen

CPP 12.3: Vortrag

Donnerstag, 27. März 2003, 10:45–11:00, ZEU/260

Nanocomposites of Teflon AF containing three dimensionally distributed Ag and FeNiCo isolated clusters by vapor phase co-deposition — •Abhijit Biswas, Oral Cenk Aktas, Jörn Kanzow, Ulrich Schürmann, Vladimir Zaporojtchenko, and Franz Faupel — Lehrstuhl für Materialverbunde, Technische Fakultät der CAU, Kaiserstr. 2, D - 24143, Kiel, Germany

Fabrication of nanocomposite materials consisting of finely dispersed mixtures of polymer and isolated metallic clusters is of considerable technological interest. However, due to the strong nanoparticles aggregation tendency during the production of such nanostructures, one of the major technological challenge is the control on the particles size distribution while generating high clusters volume filling in the quantum size range. The present work is aimed to generate narrow size distribution of non interacting clusters in the case of a noble metal and a more reactive 3d alloy material in a common amorphous organic medium. A simple one step vapor phase elevated temperature co-deposition is employed to generate metallic clusters three dimensionally dispersed in the polymer matrix with uniform size. Homogeneously distributed isolated clusters of Ag and FeNiCo are separately produced with appropriate volume filling in Teflon AF matrix at co-deposition temperatures (105-160 C) with clusters size distribution of 5-8 & 6-8 nm respectively. TEM has been applied to characterize the nanocomposites of thicknesses 100 nm. UV-vis optical and magnetic properties of the nanocomposites are also discussed.