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Crystal structure of highly concentrated, ionic microgel suspensions studied by neutron scattering

Gasser, Urs ; Sierra-Martin, B. ; Fernandez-Nieves, A.

In: Physical Review, 2009, vol. 79, no. 5, p. 051403

We present a neutron-scattering investigation of the crystal structure formed by pH-sensitive poly(2-vinylpyridine) microgel particles with 5 wt % of cross-linker. We focus on highly swollen particles and explore concentrations ranging from below close packing to well above close packing, where the particles are forced to shrink and/or interpenetrate. The crystal structure is found to be random...