Origin Of The Slow Dynamics And The Aging Of A Soft Glass
PHYSICAL REVIEW LETTERS(2006)
摘要
We study by light microscopy a soft glass consisting of a compact arrangement of polydisperse multilamellar vesicles. We show that its slow and nonstationary dynamics results from the unavoidable small fluctuations of temperature, which induce intermittent local shear deformations in the sample, because of thermal expansion and contraction. Temperature-induced shear provokes both reversible and irreversible rearrangements whose amplitude decreases with time, leading to an exponential slowing down of the dynamics with sample age.
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关键词
thermal expansion,complex fluid,shear deformation,light microscopy
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