3/17/2024 0 Comments 3d world magazine 124![]() ![]() ![]() (c) Resulting chiral architecture corresponding to the enlarged region in (a). ![]() This approximation is justified for wavelengths large compared to the length L. The metarod is composed of ordinary achiral elastic rods. (b) Next, we approximate a homogeneous uniaxial chiral rod with full rotational symmetry by the depicted chiral metarod with threefold rotational symmetry. If we replace each segment by either an achiral homogeneous cylindrical rod or by a homogeneous uniaxial chiral rod, we approach an achiral or a chiral 3D quasicrystal in the limit of large approximant order, respectively. An animated version of the 3 / 2 approximant is shown in Supplemental Material, Video 1. The enlarged area highlights three types of segments between these points, i.e., the edges (red), the face diagonals (blue dotted) of the two types of rhombohedra, and the shortest body diagonals (gray dashed) of the thinner rhombohedra. The black points result from the cut-and-project method. (a) Illustration of the q / p = 3 / 2 approximant of a 3D icosahedral quasicrystalline metamaterial. ![]()
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