Bulk Ferroelectric Metamaterial with Enhanced Piezoelectric and Biomimetic Mechanical Properties from Additive Manufacturing.
Bulk Ferroelectric Metamaterial with Enhanced Piezoelectric and Biomimetic Mechanical Properties from Additive Manufacturing.
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DOI：
10.1021/acsnano.1c05003
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发表时间：
2021-09-28
期刊：
影响因子：
17.1
通讯作者：
Wang X
中科院分区：
文献类型：
--
作者：
Li J;Yang F;Long Y;Dong Y;Wang Y;Wang X
三维(3D)铁电材料是实现人机交互、能源可持续性和增强治疗的机电构建块。然而，目前的天然或合成材料不能同时提供高的压电响应和所需的机械韧性来满足实用性。在这里，通过低电压辅助3D打印技术，创造了具有陶瓷状压电性能和骨状断裂韧性的片状铁电超材料。由软铁电层和硬电极层周期性插层的一步印刷体结构，显示出显著提高的纵向压电荷电系数(D33)，超过150pC N−1，以及优异的抗折断性能，约5.5 Mpa·m1/2，是传统压电陶瓷的3倍以上。优异的印刷性能以及高的压电性和机械性能的结合使我们能够创造出一种具有可调各向异性压电性和类似骨的力学性能的类骨结构，显示出制造实用、高性能和智能生物系统的潜力。
Three-dimensional (3D) ferroelectric materials are electromechanical building blocks for achieving human–machine interfacing, energy sustainability, and enhanced therapeutics. However, current natural or synthetic materials cannot offer both a high piezoelectric response and desired mechanical toughness at the same time to meet the practicality. Here, a lamellar ferroelectric metamaterial was created with a ceramic-like piezoelectric property and a bone-like fracture toughness through a low-voltage-assisted 3D printing technology. The one-step printed bulk structure, consisting of periodically intercalated soft ferroelectric and hard electrode layers, exhibited a significantly enhanced longitudinal piezoelectric charge coefficient (d33) of over 150 pC N−1, as well as a superior fracture resistance of ~5.5 MPa·m1/2, more than three times higher than conventional piezo-ceramics. The excellent printability together with the combination of both high piezoelectric and mechanical behaviors allowed us to create a bone-like structure with tunable anisotropic piezoelectricity and bone-comparable mechanical properties, showing a potential of manufacturing practical, high-performance, and smart biological systems.
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