Dynamic light scattering and cryogenic transmission electron microscopy investigations on metallo-supramolecular aqueous micelles: Evidence of secondary aggregation

Oren Regev, Jean François Gohy, Bas G.G. Lohmeijer, Sunil K. Varshney, Dominique H.W. Hubert, Peter M. Frederik, Ulrich S. Schubert

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

Metallo-supramolecular diblock copolymers consisting of a polystyrene (PS) block connected to a poly(ethylene oxide) (PEO) block by a bis(terpyridine)ruthenium complex (PS20-[Ru]-PEOy) were used to prepare aqueous micelles. The length of the PS block was kept constant, while two PEOs of different molecular weight were used. The resulting hydrated micelles and aggregates were characterized by a combination of cryogenic transmission electron microscopy (cryo-TEM) and dynamic light scattering measurements. The results were compared to those obtained for a covalent counterpart (PS22-b-PEO70). Cryogenic transmission electron microscopy allowed visualization of the PS core of the micelles. Moreover, the aggregates result from clustering of individual micelles.

Original languageEnglish
Pages (from-to)407-411
Number of pages5
JournalColloid and Polymer Science
Volume282
Issue number4
DOIs
StatePublished - 1 Feb 2004
Externally publishedYes

Keywords

  • Block copolymers
  • Cryogenic transmission electron microscopy
  • Dynamic light scattering
  • Metallo-supramolecular chemistry
  • Micelles

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