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Regensburg 2004 – wissenschaftliches Programm

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CPP: Chemische Physik und Polymerphysik

CPP 16: POSTER: Computational Physics, Complex Systems

CPP 16.8: Poster

Dienstag, 9. März 2004, 17:00–19:00, B

Nanoparticle superstructures in carbonaceous matrix upon ion irradiation of polymer-metal nanocomposites — •Oral Cenk Aktas1, Abhijit Biswas1, Devesh Kumar Avasthi2, Dietmar Fink3, Jörn Kanzow1, Ulrich Schürmann1, Usman Saeed1, Vladimir Zaporojtchenko1, and Franz Faupel11Lehrstuhl für Materialverbunde, Technische Fakultät der CAU, Kaiserstr. 2, D - 24143, Kiel, Germany — 2Nuclear Science Centre, New Delhi - 110067, India — 3Hahn-Meitner-Institut, Glienicker Str. 100, D - 14109, Berlin, Germany

Nanoparticle re-arrangement is observed upon 120 MeV Au ion beam irradiation of nanocomposites (ca. 100 nm) of Teflon AF containing different metallic clusters at ion fluences ranging from 1 x 10 11 ions/cm 2 to 3 x 10 12 ions/cm 2 . Two dimensionally distributed Au clusters are found to be transformed into long cluster chains of seemingly helical pattern in the organic matrix like pearls on a string. Comparatively diluted three dimensionally arranged Ag nanoparticles are observed to be concentrated in the formed mesh of carbon-enriched nanoregions upon irradiation. Diffusionally moving clusters are assumed to be trapped in the ion beam induced additional free volume leading to different nanostructures.

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