论文标题
剪切软物质中的长度尺度敏感地取决于分子相互作用
Length-scales in sheared soft matter depend sensitively on molecular interactions
论文作者
论文摘要
软物质和其他材料中的结构和秩序与颗粒之间相互作用的性质密切相关。一个重要的研究目标是找到合适的控制机制，增强或抑制不同的结构。使用动态密度功能理论，我们研究了模型系统的粒子间相关性中外部剪切和特征长度尺度之间的相互作用。我们表明，剪切可以可控制地将特征长度尺度从一个变为另一个截然不同的价值。此外，随着粒子相互作用形式的特定小变化，施加的剪切物可以选择性地增强或抑制系统的不同特征波长，从而显示了如何调整这些波长。我们的结果表明，可以利用对流动的非线性反应来设计新颖的响应材料。
The structure and degree of order in soft matter and other materials is intimately connected to the nature of the interactions between the particles. One important research goal is to find suitable control mechanisms, to enhance or suppress different structures. Using dynamical density functional theory, we investigate the interplay between external shear and the characteristic length-scales in the interparticle correlations of a model system. We show that shear can controllably change the characteristic length-scale from one to another quite distinct value. Moreover, with specific small changes in the form of the particle interactions, the applied shear can either selectively enhance or suppress the different characteristic wavelengths of the system, thus showing how to tune these. Our results suggest that the nonlinear response to flow can be harnessed to design novel actively responsive materials.
