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Applied Physics A

, Volume 74, Supplement 1, pp s1270–s1273 | Cite as

Living polynucleotides formed by the spontaneous aggregation of dilauroylphosphonucleosides

  • F. Baldelli Bombelli
  • D. Berti
  • U. Keiderling
  • P. Baglioni

Abstract.

This contribution concerns a structural investigation of dilauroylphosphonucleoside aggregates in aqueous solutions as a function of ionic strength and surfactant concentration. A micellar growth in the axial direction to form worm-like aggregates is observed as the surfactant concentration is increased, until the system shows a distinct viscoelastic behavior, which suggests the presence of a polymer-like network. Small angle neutron scattering (SANS) allows the structural properties of such micellar networks to be inferred below and above the threshold concentration of entanglement. A merging of SANS and SLS data in fact provides a spectral window corresponding to all the relevant length scales of the system in the direct space. These worm-like aggregates are characterized in terms of cross-sectional radius, persistence length and overall molar mass, while the micellar network can be described by its mesh size.

PACS: 61.12.Ex; 61.25.Hq 

Copyright information

© Springer-Verlag 2002

Authors and Affiliations

  • F. Baldelli Bombelli
    • 1
  • D. Berti
    • 1
  • U. Keiderling
    • 2
  • P. Baglioni
    • 1
  1. 1.Department of Chemistry and CSGI, University of Florence, Via della Lastruccia 3, Sesto Fiorentino, 50019 Florence, ItalyIT
  2. 2.Berlin Neutron Scattering Center, Hahn Meitner Institut, Glienicker Strasse 100, 14109 Berlin, GermanyDE

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