Journal
PHYSICAL REVIEW LETTERS
Volume 106, Issue 16, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.106.168301
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Funding
- Agence Nationale de la Recherche [ANR-06-BLAN-0315]
- MENESR
- Exzellenzinitiative des Bundes und der Lander
- European Science Foundation (ESF)
- Agence Nationale de la Recherche (ANR) [ANR-06-BLAN-0315] Funding Source: Agence Nationale de la Recherche (ANR)
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We characterize the response of compressed, sheared polymer-brush bilayers with colloidal inclusions to highly nonstationary inversion processes by means of molecular dynamics simulations and scaling theory. Bilayers with a simple (dimeric) solvent reveal an overshoot for the shear stress, while simulations of dry brushes without explicit solvent molecules fail to display this effect. We demonstrate that mechanical instabilities can be controlled by the inclusion of macromolecular structures, such as colloids of varying softness. Based on a recently developed theory, we suggest a scaling approach to determine a characteristic time for conformational and collective responses.
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