Negative to zero Poisson’s ratio adjustable UV-PDMS flexible metamaterials fabricated by using 3D photolithography

IF 7.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials & Design Pub Date : 2025-03-05 DOI:10.1016/j.matdes.2025.113805

Riku Ito , Yuji Takata , Yuya Tanaka , Hiroshi Toshiyoshi , Takaaki Suzuki

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Abstract

Mechanical metamaterials (MMs) exhibit mechanical characteristics that are challenging to achieve using existing isotropic materials. Due to their unique characteristics, MMs hold significant potential for applications in diverse fields such as space, architecture, and robotics. This study proposes a method for processing and tuning the mechanical characteristics of MMs composed of UV-curable silicone rubber (UV-PDMS) submillimeter-sized thorough holes, specifically for integration into flexible microdevices. We focused on the microfabrication of polymeric materials with elastic limits and MMs regions, which have traditionally been difficult to achieve. Using 3D photolithography, UV-PDMS was successfully processed to incorporate submillimeter-sized through-holes. Furthermore, MMs with different linewidths were fabricated using from an identical mask pattern by only adjusting the UV incidence angle and exposure dose using 3D photolithography. The resulting flexible MMs exhibited tunable Poisson’s ratios within the range of −0.16 to −0.06.

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来源期刊

Materials & Design Engineering-Mechanical Engineering

CiteScore

14.30

自引率

7.10%

发文量

1028

审稿时长

85 days

期刊介绍： Materials and Design is a multi-disciplinary journal that publishes original research reports, review articles, and express communications. The journal focuses on studying the structure and properties of inorganic and organic materials, advancements in synthesis, processing, characterization, and testing, the design of materials and engineering systems, and their applications in technology. It aims to bring together various aspects of materials science, engineering, physics, and chemistry. The journal explores themes ranging from materials to design and aims to reveal the connections between natural and artificial materials, as well as experiment and modeling. Manuscripts submitted to Materials and Design should contain elements of discovery and surprise, as they often contribute new insights into the architecture and function of matter.