Dresden 2026 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 33: Complex Fluids, Colloids, Micelles and Vesicles II
CPP 33.3: Talk
Wednesday, March 11, 2026, 10:45–11:00, ZEU/LICH
Evaporation-driven assembly of colloidal monolayers and multilayers — •Qingguang Xie1 and Jens Harting1,2 — 1Helmholtz-Institut Erlangen-Nürnberg for Renewable Energy (IET-2), Forschungszentrum Jülich, Erlangen, Germany — 2Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
Drying of colloidal suspension films is a common approach to synthesize colloidal monolayers and multilayers for applications such as photovoltaics and catalysis. The fundamental understanding of the complex processes involved in film drying is essential for controlling and optimizing the deposition structure. We numerically investigate the drying dynamics of both thin and thick colloidal suspension films. For thin films, we focus on the influence of substrate and particle wettability on assembled monolayers. High substrate wettability promotes hexagonally packed monolayers, while low wettability leads to droplet formation and particle clustering. Furthermore, we reveal that higher particle wettability can mitigate the impact of substrate wettability and facilitate the formation of highly ordered monolayers. We propose theoretical models predicting the surface coverage fraction dependent on particle volume fraction, initial film thickness, particle radius, as well as substrate and particle wettability, and validate these models with simulations. In a further step, we investigate the drying of thick films with different particle-particle interactions. Weak interactions led to densely packed structures, while strong interactions led to more porous structures due to aggregation.
Keywords: evaporation; assembly; colloidal particles; monolayer; film