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Interfacial fluid rheology of soft particles

Maximilian M. Schmidt1, José Ruiz-Franco2*, Steffen Bochenek1, Fabrizio Camerin3, Emanuela Zaccarelli4,5*, Andrea Scotti6*

1 Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, 52074 Aachen, Germany

2 Physical Chemistry and Soft Matter, Wageningen University and Research, Stippeneng 4, 6708WE Wageningen, The Netherlands

3 Soft Condensed Matter & Biophysics, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584 CC Utrecht, The Netherlands

4 CNR Institute of Complex Systems, Uos Sapienza, Piazzale Aldo Moro 2, 00185 Roma, Italy

5 Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 2, 00185 Roma, Italy

6 Department of Biomedical Science, Faculty of Health and Society, Malmö University, SE-205 06 Malmö, Sweden

* Corresponding authors emails: jmruizfranco@gmail.com, emanuela.zaccarelli@cnr.it, andrea.scotti@mau.se
DOI10.24435/materialscloud:df-x5 [version v1]

Publication date: Jan 24, 2024

How to cite this record

Maximilian M. Schmidt, José Ruiz-Franco, Steffen Bochenek, Fabrizio Camerin, Emanuela Zaccarelli, Andrea Scotti, Interfacial fluid rheology of soft particles, Materials Cloud Archive 2024.14 (2024), https://doi.org/10.24435/materialscloud:df-x5


In situ interfacial rheology and numerical simulations are used to investigate microgel monolayers in a wide range of packing fractions, ζ2D. The heterogeneous particle compressibility determines two flow regimes characterized by distinct master curves. To mimic the microgel architecture and reproduce experiments, an interaction potential combining a soft shoulder with the Hertzian model is introduced. In contrast to bulk conditions, the elastic moduli vary nonmonotonically with ζ2D at the interface, confirming long-sought predictions of reentrant behavior for Hertzian-like systems.

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microgels liquid-liquid interfaces softness and elasticity elastic properties Hertzian model

Version history:

2024.14 (version v1) [This version] Jan 24, 2024 DOI10.24435/materialscloud:df-x5