Journal
BIOMACROMOLECULES
Volume 12, Issue 10, Pages 3412-3417Publisher
AMER CHEMICAL SOC
DOI: 10.1021/bm2010142
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Funding
- ARO [W911NF-09-1-0373]
- ONR [N00014-10-1-0348]
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Conventional transmission electron microscopy (TEM) was utilized to characterize vesicles formed by the spontaneous self-assembly of a novel zwitterionic block copolymer in the ionic liquid (2-hydroxyethyl)-dimethylammonium methanesulfonate as well as in 0.1 M phosphate buffered saline (PBS). This block copolymer was synthesized via ring-opening metathesis polymerization (ROMP) of a norbornene-based sulfobetaine, followed by its end-functionalization with polystyrene to generate the necessary amphiphilic structure. The ionic liquid enabled the visualization of the vesicles in their swollen state by TEM, demonstrating a new method for improved characterization of polymer vesicles.
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