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

被引：30
作者：
Regev, O
Gohy, JF
Lohmeijer, BGG
Varshney, SK
Hubert, DHW
Frederik, PM
Schubert, US
机构：
[1] Eindhoven Univ Technol, Ctr Nanomat, Lab Macromol Chem & Nanosci, NL-5600 MB Eindhoven, Netherlands
[2] Dutch Polymer Inst, NL-5600 MB Eindhoven, Netherlands
[3] Catholic Univ Louvain, Unite Chim Mat Inorgan & Organ, B-1348 Louvain, Belgium
[4] Polymer Source Inc, Dorval, PQ H9P 1G7, Canada
[5] FEI Electron Opt, NL-5600 KA Eindhoven, Netherlands
[6] Univ Limburg, Dept Pathol Electron Microscopy, NL-6200 MD Maastricht, Netherlands
来源：
COLLOID AND POLYMER SCIENCE | 2004年 / 282卷 / 04期
关键词：
metallo-supramolecular chemistry; block copolymers; micelles; cryogenic transmission electron microscopy; dynamic light scattering;
D O I：
10.1007/s00396-003-0975-1
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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.
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页码：407 / 411
页数：5
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