| 초록 |
Heterogeneity among particles is their inherent feature, which makes the prediction of the properties of assembled structures and materials composed of many particles non-deterministic. Here, we report a promising strategy to quantify and visualize the field of heterogeneous and anisotropic interactions between non-spherical particles using the rotational measurement of optical laser tweezers. The mutual configuration and separation of two particles at an oil-water interface were optically controlled, and the corresponding capillary interaction behaviors were directly measured. As a result, the optimal particle configuration at an energetically favorable state was determined, depending on the interparticle distance. Visualization of the capillary field around individual particles demonstrated that the interface deformation by the presence of non-spherical particles and thus the capillary force were highly influenced by undulation of the meniscus as well as geodesic curvature.. |
