Dynamics and structure of an aging binary colloidal glass.
Dynamics and structure of an aging binary colloidal glass.
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老化二元胶体玻璃的动力学和结构。
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
E. Weeks
中科院分区：
文献类型：
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作者：
Jennifer M. Lynch;Gianguido C. Cianci;E. Weeks
我们在液体中由微米级颗粒组成的胶体悬浮液中研究老化。通过增加颗粒浓度，使该系统成为玻璃化的。我们用快速激光扫描共聚焦显微镜观察了由两种尺寸的颗粒组成的样品，其尺寸比为1：2.1，体积分数比为1：6。这项技术产生了胶体玻璃深处的实时三维电影。具体地说，我们研究颗粒的大小、运动和结构组织如何与玻璃的整体老化有关。粒子在空间上不同的协作群中运动。这些移动区域往往含有更丰富的小颗粒，这些小颗粒促进了附近两种大小颗粒的运动。
We study aging in a colloidal suspension consisting of micron-sized particles in a liquid. This system is made glassy by increasing the particle concentration. We observe samples composed of particles of two sizes, with a size ratio of 1:2.1 and a volume fraction ratio 1:6, using fast laser scanning confocal microscopy. This technique yields real-time, three-dimensional movies deep inside the colloidal glass. Specifically, we look at how the size, motion, and structural organization of the particles relate to the overall aging of the glass. Particles move in spatially heterogeneous cooperative groups. These mobile regions tend to be richer in small particles, and these small particles facilitate the motion of nearby particles of both sizes.