Université de Fribourg

Shear stress-responsive polymersome nanoreactors inspired by the marine bioluminescence of dinoflagellates

Rifaie‐Graham, Omar ; Galensowske, Nikolas F. B. ; Dean, Charlie ; Pollard, Jonas ; Balog, Sandor ; Gouveia, Micael G. ; Chami, Mohamed ; Vian, Antoine ; Amstad, Esther ; Lattuada, Marco ; Bruns, Nico

In: Angewandte Chemie International Edition, 2020, vol. 60, no. 2, p. 904-909

Some marine plankton called dinoflagellates emit light in response to the movement of surrounding water, resulting in a phenomenon called milky seas or sea sparkle. The underlying concept, a shear-stress induced permeabilisation of biocatalytic reaction compartments, is transferred to polymer-based nanoreactors. Amphiphilic block copolymers that carry nucleobases in their hydrophobic block...

Université de Fribourg

Structural behavior of cylindrical polystyrene-block-poly(ethylene-butylene)-block-polystyrene (SEBS) triblock copolymer containing MWCNTs: on the influence of nanoparticle surface modification

Hasanabadi, Noushin ; Nazockdast, Hossein ; Gajewska, Bernadetta ; Balog, Sandor ; Gunkel, Ilja ; Bruns, Nico ; Lattuada, Marco

In: Macromolecular Chemistry and Physics, 2017/218/22/n/a-n/a

In this work, the influence of carbon nanotubes (CNTs) on the self-assembly of nanocomposite materials made of cylinder-forming polystyrene-block-poly(ethylene- butylene)-block-polystyrene (SEBS) is studied. CNTs are modified with polystyrene (PS) brushes by surface-initiated atom transfer radical polymerization to facilitate both their dispersion and the orientation of neighboring PS domains...

Université de Fribourg

Filling polymersomes with polymers by peroxidase-catalyzed atom transfer radical polymerization

Dinu, Maria Valentina ; Spulber, Mariana ; Renggli, Kasper ; Wu, Dalin ; Monnier, Christophe A. ; Petri-Fink, Alke ; Bruns, Nico

In: Macromolecular Rapid Communications, 2015, vol. 36, no. 6, p. 507–514

Polymersomes that encapsulate a hydrophilic polymer are prepared by conducting biocatalytic atom transfer radical polymerization (ATRP) in these hollow nanostructures. To this end, ATRPase horseradish peroxidase (HRP) is encapsulated into vesicles self-assembled from poly(dimethylsiloxane)-block-poly(2-methyl-2-oxazoline) (PDMS-b-PMOXA) diblock copolymers. The vesicles are turned into...