Order-disorder transitions via shape-evolving colloids

The design of colloids capable of evolving and integrating multiple functions offers new opportunities for engineering next-generation materials. Unlike traditional solid spheres, elastic colloidal particles with diverse morphologies enable the formation of novel assemblies and structures. Here, we present a class of responsive colloidal particles whose shape transitions, volume change, and permeability are governed by structural swelling. These particles exhibit reversible shape-shifting behavior, transitioning between disordered and ordered states in response to changes in polymer concentration and temperature. Particle shape serves as a tool for encoding assembly information, while dynamic responsiveness enables tunable packing. This scalable approach offers a versatile methodology for producing switchable building blocks with value across physical and biological disciplines, with potential applications in smart materials, biomedical substrates, and responsive coatings.