How a liquid becomes a glass both on cooling and on heating

Abstract

The onset of structural arrest and glass formation in a concentrated suspension of silica nanoparticles in a water-lutidine binary mixture near its consolute point is studied by exploiting the near-critical fluid degrees of freedom to control the strength of an attraction between particles and multispeckle x-ray photon correlation spectroscopy to determine the particles' collective dynamics. This model system undergoes a glass transition both on cooling and on heating, and the intermediate liquid realizes unusual logarithmic relaxations. How vitrification occurs for the two different glass transitions is characterized in detail and comparisons are drawn to recent theoretical predictions for glass formation in systems with attractive interactions.

4 pages, 4 figures

References in corpus (9)

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• Deconstructing the glass transition through critical experiments on colloids
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• When gel and glass meet: A mechanism for multistep relaxation
• Three-dimensional structure of a single colloidal crystal grain studied by coherent x-ray diffraction
• Dynamical arrest: interplay of the glass and of the gel transitions
• Particle-scale structure in frozen colloidal suspensions from small angle x-ray scattering
• Demixing, remixing and cellular networks in binary liquids containing colloidal particles
• Analyses of kinetic glass transition in short-range attractive colloids based on time-convolutionless mode-coupling theory
• Postponing the dynamical transition density using competing interactions
• X-ray Near Field Speckle: Implementation and Critical Analysis