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

O. Regev, J.M.W. Gohy, B.G.G. Lohmeijer, S.K. Varshney, D.H.W. Hubert, P.M. Frederik, U.S. Schubert

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Abstract

Metallo-supramol. 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 prep. aq. micelles. The length of the PS block was kept const., while two PEO of different mol. wt. 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
Publication statusPublished - 2004

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