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Issue 44, 2016

Tunable slow dynamics in a new class of soft colloids

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Abstract

By means of extensive simulations, we investigate concentrated solutions of globular single-chain nanoparticles (SCNPs), an emergent class of synthetic soft nano-objects. By increasing the concentration, the SCNPs show flattening, and even reentrant behaviour, in the density dependence of their structural and dynamic correlations, as well as a soft caging regime and weak dynamic heterogeneity. The latter is confirmed by validation of the Stokes–Einstein relation up to concentrations far beyond the overlap density. Therefore SCNPs arise as a new class of soft colloids, exhibiting slow dynamics and actualizing in a real system the structural and dynamic anomalies proposed by models of ultrasoft particles. Quantitative differences in the dynamic behaviour depend on the SCNP deformability, which can be tuned through the degree of internal cross-linking.

Graphical abstract: Tunable slow dynamics in a new class of soft colloids

Article information


Submitted
19 Sep 2016
Accepted
11 Oct 2016
First published
12 Oct 2016

Soft Matter, 2016,12, 9039-9046
Article type
Paper

Tunable slow dynamics in a new class of soft colloids

F. Lo Verso, J. A. Pomposo, J. Colmenero and A. J. Moreno, Soft Matter, 2016, 12, 9039 DOI: 10.1039/C6SM02136K

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