3D Printed Embedded Metamaterials

The manufacturing of 3D and conformal metamaterials remains a major challenge. In this paper, the projection micro-stereolithography 3D printing technology combined with the liquid metal filling method is employed to fabricate the metamaterials, which are characterized with embedded features that can effectively protect the metal resonance layer from external influence, and integrated molding of macro –micro structures and function-structure. AbstractThe manufacturing of 3D and conformal metamaterials remains a major challenge. The projection micro-stereolithography 3D printing technology combined with the liquid metal filling method is employed here to fabricate the metamaterials, which are characterized with embedded features that can effectively protect the metal resonance layer from external influence, and integrated molding of macro –micro structures and function-structure. To demonstrate the robustness and flexibility of the proposed method, three types of metamaterials are fabricated: 3D orthogonal split-ring resonator metamaterial, bionic compound eye conformal metamaterial, and a five-layer broadband conformal metamateria l in the form of hemispherical moth-eye, which are costly, tedious, and time consuming in conventional fabrication methods. And the layout of the filling channel is optimized and the polydimethylsiloxane coating post-treatment process is applied to smooth the surface roughness caused by the staircas e effect of 3D printing to improve the transmi...

Source: Small - October 21, 2021 Category: Nanotechnology Authors: Kun Peng Zhang, Yan Fei Liao, Bin Qiu, Yue Kun Zheng, Ling Ke Yu, Gong Han He, Qin Nan Chen, Dao Heng Sun Tags: Research Article Source Type: research