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|Title:||Light scattering and luminescence studies on self-aggregation behavior of amphiphilic copolymer micelles|
|Authors:||Yao, J.H. |
|Source:||Yao, J.H., Mya, K.Y., Li, X., Parameswaran, M., Xu, Q.-H., Loh, K.P., Chen, Z.-K. (2008-01-24). Light scattering and luminescence studies on self-aggregation behavior of amphiphilic copolymer micelles. Journal of Physical Chemistry B 112 (3) : 749-755. ScholarBank@NUS Repository. https://doi.org/10.1021/jp076351i|
|Abstract:||The self-aggregation behavior of three amphiphilic graft copolymers, oligo(9,9-dihexyl)fluorence-graft-poly-(ethylene oxide) (OHF-g-PEO), with different architectures was studied by dynamic and static light scattering (DLS and SLS) in combination with fluorescence spectroscopy and transmission electron microscopy (TEM). The formation of self-assembled polymeric micelles was confirmed by SLS and TEM. DLS and SLS analyses showed that the architecture of graft copolymers has a dramatic effect on critical aggregation concentration (CAC), micelle size distribution, apparent aggregation number (N agg app), and apparent molecular weight of polymer aggregates (Mw,agg app). An architecture-dependent excimer emission, resulting from the π-π stacking of the oligofluorene backbones, was also observed from the photoluminescence spectra of the micelle aqueous solutions, which indicated a strong intermolecular interaction among the polymeric molecules. The excimer emission was further investigated by time-resolved fluorescence spectroscopy. © 2008 American Chemical Society.|
|Source Title:||Journal of Physical Chemistry B|
|Appears in Collections:||Staff Publications|
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