通过X射线光子相关光谱法研究胶体凝胶中的慢动力学和老化现象。
Slow dynamics and aging in colloidal gels studied by x-ray photon correlation spectroscopy.
作者信息
Fluerasu Andrei, Moussaïd Abdellatif, Madsen Anders, Schofield Andrew
机构信息
European Synchrotron Radiation Facility, Boîte Postale 220, F-38043 Grenoble, France.
出版信息
Phys Rev E Stat Nonlin Soft Matter Phys. 2007 Jul;76(1 Pt 1):010401. doi: 10.1103/PhysRevE.76.010401. Epub 2007 Jul 2.
Slow, nonequilibrium dynamics during delayed sedimentation in a colloidal depletion gel was studied by x-ray photon correlation spectroscopy. The intermediate scattering functions change during the process from stretched to compressed exponential decays, indicating a jamming transition toward full aging. A complex aging behavior follows this process; it is proposed that large-scale network deformations trigger an unjamming, leading to the final collapse of the gel.
通过X射线光子相关光谱研究了胶体耗尽凝胶中延迟沉降过程中的缓慢非平衡动力学。中间散射函数在从拉伸指数衰减到压缩指数衰减的过程中发生变化，表明向完全老化的堵塞转变。此过程之后是复杂的老化行为；有人提出，大规模网络变形引发解堵，导致凝胶最终坍塌。
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