Study on spatio-temporal hierarchial structure in soft matter by three-dimensional microrheology

在这项研究中，我们开发了一种新的技术，可以测量具有复杂内部结构的软物质的介观局域相互作用和力学性质，并具有三维细观尺度的分辨率。我们研制了一种可以对样品进行三维扫描的双光束光钳和一种可以在三维空间捕获不同位置颗粒的多光束光钳。利用这些系统，我们测量了(1)液晶中粒子之间的长程相互作用，(1)单个囊泡的机械响应，(3)双层层片系统中的中观线性和非线性粘度，(4)流体动力耦合粒子的集体运动。

In this study, we developed a new technique that can be measured mesoscopic local interactions and mechanical properties in soft matter which has a complex internal structure with a resolution of meso-scale in three-dimension. We developed a two-beam optical tweezers which can scan a sample in three dimensions and a multi-beam optical tweezers which can trap particles at different positions in three-dimensions. Using these systems, we measured(1) a long-range interaction between particles in a liquid crystal,(1) mechanical response of a single vesicle,(3) mesoscipic linear and nonlinear viscosity in bilayer lamellar system,(4) collective motion in hydrodynamically coupled particles.