Interplay between Spinodal Decomposition and Glass Formation in Proteins Exhibiting Short-Range Attractions

Details Interplay between Spinodal Decomposition and Glass Formation in Proteins Exhibiting Short-Range Attractions Interplay between Spinodal Decomposition and Glass Formation in Proteins Exhibiting Short-Range Attractions

2009-02-02

arxiv.org/abs/0902.0310v1

PRL 99, 118301 (2007)

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

10.1103/PhysRevLett.99.118301

We investigate the competition between spinodal decomposition and dynamical arrest using aqueous solutions of the globular protein lysozyme as a model system for colloids with short-range attractions. We show that quenches below a temperature Ta lead to gel formation as a result of a local arrest of the proteindense phase during spinodal decomposition. The rheological properties of these gels allow us to use centrifugation experiments to determine the local densities of both phases and to precisely locate the gel boundary and the attractive glass line close to and within the unstable region of the phase diagram.

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