Behavior of polymeric stars with fullerene core in aqueous solution: structural investigation by neutron and light scattering
Abstract
Star-shape derivatives of C60 with poly(N-vinylpyrrolidone) chains, grafted to C60, were studied in aqueous solution by small-angle neutron scattering in the range of q=0.04-0.8nm-1 and dynamic light scattering. From SANS data we found the functionality of fullerene center n~4. Really a star's gyration radius ~6nm exceeded the Gaussian molecular size by ~40% and the volume was increased by the factor of 3. Such polymer shells make stars' interaction stronger leading to their association. Dynamic light scattering indicates the formation of extended associates (~1000nm in diameter) involving ~10% of stars.
- Publication:
-
Physica B Condensed Matter
- Pub Date:
- July 2004
- DOI:
- 10.1016/j.physb.2004.03.111
- Bibcode:
- 2004PhyB..350E.419L
- Keywords:
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- Fullerenes polymers stars;
- Structure