Dresden 2006 – wissenschaftliches Programm

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CPP: Chemische Physik und Polymerphysik

CPP 11: POSTER Disperse Polymer Systems

CPP 11.5: Poster

Dienstag, 28. März 2006, 17:00–19:00, P3

Assembly of SiO₂ nanoparticles into the interstitial sites of ordered polymethylmethacrylate beads — •Simone Herth — Rensselaer Nanotechnology Center, Rensselaer Polytechnic Institute, Troy, NY, USA

For nanocomposite materials, their optical, magnetic, and electrical properties could be improved by placing the nanoparticles equidistant to one another or by decreasing the width of the interparticle distance distribution. One attempt to achieve this special arrangement is the assembly of nanoparticles into the interstitial sites of an ordered lattice of uniform polymer beads, such as polymethylmethacrylate (PMMA), by centrifugation. Due to the different densities of PMMA and SiO₂, the PMMA would normally always settle down on top of the SiO₂ nanoparticles during the centrifugation process. For that reason, the SiO₂ nanoparticles were linked with the PMMA beads by a silane linker prior to centrifugation. Scanning electron micrographs of the dried pellets revealed a short range order of the PMMA beads, a good dispersion of SiO₂ nanoparticles, and a good adhesion of the SiO₂ nanoparticles to the PMMA beads.