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Crystallization-driven self-assembly (CDSA) is a powerful approach for the solution self-assembly of block copolymers, enabling the formation of hierarchical nanostructures with high uniformity and structural precision. Unlike conventional solution self-assembly, where morphology is largely dictated by block composition, CDSA exploits crystallization of the core-forming block to favour low-curvature structures such as fibers and platelets and enables living growth processes.

Despite these advances, relatively few examples exist in which the dimensions of CDSA-derived nanostructures can be readily controlled in two directions. Our group has explored the CDSA of poly(ester)-based block copolymers to address this challenge. In particular, polylactone-containing block copolymers provide a versatile platform for accessing anisotropic nanostructures, including well-defined two-dimensional assemblies.

Here we present the CDSA of a series of polylactone block copolymers that form a range of self-assembled nanostructures, including uniform two-dimensional platelets. Through seeded growth strategies and control over crystallization conditions, we establish design rules for the formation and dimensional control of these materials and demonstrate their epitaxial growth, highlighting their potential as biocompatible precision nanomaterials.

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Bio:

Rachel K. O鈥橰eilly鈥痠s Professor of Polymer Chemistry and Pro-Vice-Chancellor for Research at the University of Birmingham. Her research focuses on the design and synthesis of complex polymeric and nanoscale materials, particularly systems that mimic biological structures and functions, with applications in catalysis, nanomedicine, and advanced functional materials.

Professor O鈥橰eilly studied Natural Sciences at the University of Cambridge and completed her PhD at Imperial College London in 2003. After postdoctoral research at Cambridge, she held academic positions at the University of Warwick before joining Birmingham. Her work has made significant contributions to precision polymer synthesis and the development of self-assembled nanostructures.

In recognition of her research, she was elected a Fellow of the Royal Society in 2022. Professor O鈥橰eilly has received numerous national and international awards and currently leads a large interdisciplinary research programme focused on developing next-generation functional materials.