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Brushlike interactions between thermoresponsive microgel particles

Scheffold, Frank ; Díaz-Leyva, Pedro ; Reufer, Mathias ; Braham, Nasser Ben ; Lynch, Iseult ; Harden, James L.

In: Physical Review Letters, 2010, vol. 104, no. 12, p. 128304

Using a simplified microstructural picture we show that interactions between thermosensitive microgel particles can be described by a polymer brushlike corona decorating the dense core. The softness of the potential is set by the relative thickness L0 of the compliant corona with respect to the overall size of the swollen particle R. The elastic modulus in quenched solid phases derived from the...

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Temperature-sensitive poly(N-Isopropyl-Acrylamide) microgel particles: A light scattering study

Reufer, Mathias ; Díaz-Leyva, Pedro ; Lynch, I. ; Scheffold, Frank

In: European Physical Journal E, 2009, vol. 28, no. 2, p. 165-171

We present a light scattering study of aqueous suspensions of microgel particles consisting of poly(N-Isopropyl-Acrylamide) cross-linked gels. The solvent quality for the particles depends on temperature and thus allows tuning of the particle size. The particle synthesis parameters are chosen such that the resulting high surface charge of the particles prevents aggregation even in the...

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