论文标题
二元软物质混合物中的准晶体形成
Quasicrystal formation in binary soft matter mixtures
论文作者
论文摘要
使用在理论或实验中应用的策略，我们确定模型二进制软物质混合物形成准晶体的制度。使用经典密度函数理论与积分方程理论相结合来描述该系统。准晶体形成需要在某些特定比率下具有两个特征长度尺度的粒子排序。对于一个组件系统，对长度尺度与对相互作用的形式的相关性是相当充分理解的，但对于混合物而言，少知道。在我们的模型混合物中，大小的小胶体的混合物局限于界面，两个长度尺度源于大粒子对之间的相互作用范围和分别来自交叉大型相互作用。小小的长度尺寸不显着。我们查找准晶体的策略涉及在分散关系中或等效地在液态状态部分静态结构因子中调整最大值的位置。
Using a strategy that may be applied in theory or in experiments, we identify the regime in which a model binary soft matter mixture forms quasicrystals. The system is described using classical density functional theory combined with integral equation theory. Quasicrystal formation requires particle ordering with two characteristic lengthscales in certain particular ratios. How the lengthscales are related to the form of the pair interactions is reasonably well understood for one component systems, but less is known for mixtures. In our model mixture of big and small colloids confined to an interface, the two lengthscales stem from the range of the interactions between pairs of big particles and from the cross big-small interactions, respectively. The small-small lengthscale is not significant. Our strategy for finding quasicrystals involves tuning locations of maxima in the dispersion relation, or equivalently in the liquid state partial static structure factors.
