Concentration fluctuations of a binary liquid mixture in a macroporous glass

We performed static and dynamic light scattering measurements for the binary liquid mixture, carbon disulfide-nitromethane, imbedded in a 1000-A porous glass. The system exhibits strong spatial but weak temporal fluctuations, giving rise to interesting nonergodic behavior. A reasonably sharp transition was detected at a temperature ∼1 K below the bulk T c , with the system showing critical slowing-down on both sides of the transition. Despite the large pore size (in comparison with the correlation length), the intensity-intensity autocorrelation function is nonexponential with a characteristic relaxation time that does not diverge even at low temperatures, T<

Keywords:

• Critical point (thermodynamics)
• Atomic physics
• Physics
• Condensed matter physics
• Chemical composition
• Dynamic light scattering
• Correlation function (statistical mechanics)
• Carbon
• Light scattering
• Porous glass
• Relaxation (NMR)
• Autocorrelation
• Thermodynamics

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