Bulk rheology of sticky DNA-functionalized emulsions

We measure by experiment and particle-based simulation the rheology of concentrated, non-Brownian droplet emulsions functionalized with surface-bound single-stranded (ss), "sticky," DNA. In the absence of ssDNA, the emulsion viscosity increases with the dispersed phase volume fraction ϕ, b...

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Bibliographic Details
Published in:Physical review. E 2021-11, Vol.104 (5-1), p.054602-054602, Article 054602
Main Authors: Stoev, Iliya D, Caciagli, Alessio, Mukhopadhyay, Anasua, Ness, Christopher, Eiser, Erika
Format: Article
Language:English
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Summary:We measure by experiment and particle-based simulation the rheology of concentrated, non-Brownian droplet emulsions functionalized with surface-bound single-stranded (ss), "sticky," DNA. In the absence of ssDNA, the emulsion viscosity increases with the dispersed phase volume fraction ϕ, before passing through a liquid-solid transition at a critical ϕ_{c} related to random close packing. Introducing ssDNA leads to a liquid-solid transition at ϕϕ_{c}≈0.64) show weak effects of functionalization, with elastic rheology instead governed by droplet stiffness; (ii) suspensions with ϕ
ISSN:2470-0045
2470-0053
DOI:10.1103/PhysRevE.104.054602