Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 117, Issue 44, Pages 27204-27210Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.2013934117
Keywords
molecular ferroelectrics; mechanical metamaterials; hydrogel; additive manufacturing; three-dimensional printing
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Funding
- US Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-SC0018631]
- US Army Research Office [W911NF-18-2-0202]
- US National Science Foundation [1904254, 1847254]
- NY State Center of Excellence in Material Informatics
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1904254] Funding Source: National Science Foundation
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Molecular ferroelectrics combine electromechanical coupling and electric polarizabilities, offering immense promise in stimuli-dependent metamaterials. Despite such promise, current physical realizations of mechanical metamaterials remain hindered by the lack of rapid-prototyping ferroelectric metamaterial structures. Here, we present a continuous rapid printing strategy for the volumetric deposition of water-soluble molecular ferroelectric metamaterials with precise spatial control in virtually any three-dimensional (3D) geometry by means of an electric-field-assisted additive manufacturing. We demonstrate a scaffold-supported ferroelectric crystalline lattice that enables self-healing and a reprogrammable stiffness for dynamic tuning of mechanical metamaterials with a long lifetime and sustainability. A molecular ferroelectric architecture with resonant inclusions then exhibits adaptive mitigation of incident vibroacoustic dynamic loads via an electrically tunable subwavelength-frequency band gap. The findings shown here pave the way for the versatile additive manufacturing of molecular ferroelectric metamaterials.
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