多面体胶体“岩石”：低维网络
Polyhedral colloidal `rocks': low-dimensional networks
摘要：
我们介绍了一个各向异性胶体“岩石”的模型系统。由于它们的形状，通过非吸收性聚合物引入的结合与球形颗粒有很大的不同：岩石之间的结合是刚性的，不能旋转，导致强烈的挫折。我们开发了一个几何模型，捕捉岩石的本质。实验和模拟表明，胶体的几何形状导致低分形维数的结构。这与球体凝胶形成鲜明对比，球体凝胶的刚性来自局部致密区域。在高密度下，岩石形成准单组分玻璃。
英文摘要：
We introduce a model system of anisotropic colloidal `rocks'. Due to their shape, the bonding introduced via non-absorbing polymers is profoundly different from spherical particles: bonds between rocks are rigid against rotation, leading to strong frustration. We develop a geometric model which captures the essence of the rocks. Experiments and simulations show that the colloid geometry leads to structures of low fractal dimension. This is in stark contrast to gels of spheres, whose rigidity results from locally dense regions. At high density the rocks form a quasi one-component glass.
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