UNSW’s Dr Ken Wong published a paper revealing an experimental visualisation of the entire polymersome faceting process for the first time. The work is titled Faceted Polymersomes: A Sphere-to-Polyhedron Shape Transformation and was published in Chemical Science. The paper was co-authored by CBNS alumnus Dr Adam Martin, CBNS CI Professor Rob Parton and CBNS CI Professor Pall Thordarson.
The creation of “soft” deformable hollow polymeric nanoparticles with complex non-spherical shapes via block copolymer self-assembly remains a challenge. In this work, we show that a perylene-bearing block copolymer can self-assemble into polymeric membrane sacs (polymersomes) that not only possess uncommonly faceted polyhedral shapes but are also intrinsically fluorescent. Here, we further reveal for the first time an experimental visualization of the entire polymersome faceting process. We uncover how our polymersomes facet through a sphere-to-polyhedron shape transformation pathway that is driven by perylene aggregation confined within a topologically spherical polymersome shell. Finally, we illustrate the importance in understanding this shape transformation process by demonstrating our ability to controllably isolate different intermediate polymersome morphologies. The findings presented herein should provide opportunities for those who utilize non-spherical polymersomes for drug delivery, nanoreactor or templating applications, and those who are interested in the fundamental aspects of polymersome self-assembly.