Microgels are macromolecular networks swollen by the solvent they are dissolved in. They are unique systems that are distinctly different from common colloids, such as, e.g., rigid nanoparticles, flexible macromolecules, micelles or vesicles. When swollen, they are soft and have a fuzzy surface with dangling chains and the presence of cross-links provides structural integrity. Finally, microgels reveal interface activity without being amphiphilic. Microgel adsorb to fluid and rigid interfaces surfaces and their response to external stimuli allows preparing responsive emulsions and coatings which can be used, e.g., in biocatalysis and as sensors.<br/><br/>We will discuss properties of microgels of different architectures and shape at interfaces. The structure of individual microgels as well as their 2D-packing is investigated by scanning force and optical microscopy. The experimental results will be compared to computer simulations. We will demonstrate that tuning the properties of the microgels allows designing microgel layers with very different properties combining features of flexible macromolecules and of colloidal particles.

Self-assembly of soft microgels at interfaces: Tuning between macromolecular and colloidal behaviors

ACS Spring Meeting 2021

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