Stretchable piezoelectric biocrystal thin films.
Stretchable piezoelectric biocrystal thin films.
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DOI：
10.1038/s41467-023-42184-8
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发表时间：
2023-10-17
影响因子：
16.6
通讯作者：
Wang, Xudong
中科院分区：
文献类型：
--
作者：
Li, Jun;Carlos, Corey;Zhou, Hao;Sui, Jiajie;Wang, Yikai;Silva-Pedraza, Zulmari;Yang, Fan;Dong, Yutao;Zhang, Ziyi;Hacker, Timothy A.;Liu, Bo;Mao, Yanchao;Wang, Xudong
可伸缩性是可穿戴设备在与软组织或器官接口时匹配不同应变的基本属性。虽然压电性作为触觉传感器、人造皮肤或纳米发电机具有广泛的应用潜力，但由于晶相固有的刚性和硬度，使组织具有可比拟的延伸性是主要的障碍。在此，报道了一种氨基酸基压电生物晶体薄膜，它提供了组织相容的全方位可伸缩性而不受压电性的影响。在分子-溶剂相互作用和界面张力的控制下自组装的桁架状微结构使其具有可延展性。通过开放和封闭的桁架网格，这种大规模的生物晶体微结构能够承受高达40%的沿不同方向的拉伸应变，同时保持结构完整性和压电性能。在这种结构的基础上，研制了一种组织相容的可伸缩压电纳米发电机，它可以适应各种组织表面，并在多维大应变下表现出稳定的功能。在这项工作中，我们提出了一种有希望的解决方案，在一个材料系统中集成了压电性、可伸缩性和生物相容性，这是迈向组织兼容生物医学设备的关键一步。开发可伸缩的、同时保持结构和稳定的压电性的压电生物晶体是具有挑战性的。在这里，李等人。报道了一种氨基酸基压电生物晶体，具有由桁架状网络实现的全方位伸展，用于可穿戴和可植入设备。
Stretchability is an essential property for wearable devices to match varying strains when interfacing with soft tissues or organs. While piezoelectricity has broad application potentials as tactile sensors, artificial skins, or nanogenerators, enabling tissue-comparable stretchability is a main roadblock due to the intrinsic rigidity and hardness of the crystalline phase. Here, an amino acid-based piezoelectric biocrystal thin film that offers tissue-compatible omnidirectional stretchability with unimpaired piezoelectricity is reported. The stretchability was enabled by a truss-like microstructure that was self-assembled under controlled molecule-solvent interaction and interface tension. Through the open and close of truss meshes, this large scale biocrystal microstructure was able to endure up to 40% tensile strain along different directions while retained both structural integrity and piezoelectric performance. Built on this structure, a tissue-compatible stretchable piezoelectric nanogenerator was developed, which could conform to various tissue surfaces, and exhibited stable functions under multidimensional large strains. In this work, we presented a promising solution that integrates piezoelectricity, stretchability and biocompatibility in one material system, a critical step toward tissue-compatible biomedical devices. Developing piezoelectric biocrystals that are stretchable while maintaining structure and stable piezoelectricity is challenging. Here, Li et al. report an amino acid-based piezoelectric biocrystal with omnidirectional stretchability enabled by a truss-like network, for wearable and implantable devices.
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