| 초록 |
Analogous to definition of crystallographic ‘lattice’, symmetric and periodic points comprised of accumulated building blocks can be seen as ‘lattice equivalent’, resulting from material assembly. By virtue of the tailor ability of the system, we deliberately control the pattern size and dimensionality and understand the wave mechanics as well. This approach is technologically unique in that (i) it is a method that enables the construction of three-dimensional nanomaterial assembly, which has never before been observed in the field of cymatics and (ii) a massively parallel method that creates arrays over macroscale areas where the total patterned area is only limited by the size of the plate surface. Periodic and symmetric patterns are easily made in Cartesian coordination system, where liquids on the centimeter scale plate are employed as a medium. Such founding distinguishes 2D liquid from single liquid droplet in Spherical coordination system that previous studies have focused on. Coffee-ring effect in 2D liquid is utilized to enhance the periodicity and symmetry of patterns. Strong coffee-ring effect makes the particles dispersed in homogeneously, and thus makes the patterns composed of the particles homogeneously. We show how transparent polymer can be used as ‘three-dimensional spacer’ within nanoparticle superlattices assembled, which has never before been observed in cymatics. Consequently, we expect thins versatile strategy to be widely adopted by academic and industrial researchers for prototyping. |
