晶圆级异质结构压电生物有机薄膜

IF 45.8 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Pub Date : 2021-07-16 DOI:10.1126/science.abf2155

Fan Yang, Jun Li, Yin Long, Ziyi Zhang, Linfeng Wang, Jiajie Sui, Yutao Dong, Yizhan Wang, Rachel Taylor, Dalong Ni, Weibo Cai, Ping Wang, Timothy Hacker, Xudong Wang

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引用次数: 79

摘要

压电生物材料本质上适合在生物系统中耦合机械能和电能，以实现体内实时传感、驱动和发电。然而，无法大规模合成和排列压电相仍然是实际应用的一个障碍。我们提出了一种基于γ-甘氨酸晶体的晶圆级压电生物材料薄膜制造方法。这种薄膜具有三明治结构，其中甘氨酸结晶层在两层聚乙烯醇（PVA）薄膜之间自组装并自动排列。异质结构甘氨酸-PVA 薄膜的压电系数为 5.3 皮库仑/牛顿或 157.5 × 10-3 伏米/牛顿，与纯甘氨酸晶体相比，机械柔韧性提高了近一个数量级。甘氨酸-PVA 薄膜在生理环境中具有天然的兼容性和降解性，可用于开发瞬时植入式机电设备。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Wafer-scale heterostructured piezoelectric bio-organic thin films

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Wafer-scale heterostructured piezoelectric bio-organic thin films

Piezoelectric biomaterials are intrinsically suitable for coupling mechanical and electrical energy in biological systems to achieve in vivo real-time sensing, actuation, and electricity generation. However, the inability to synthesize and align the piezoelectric phase at a large scale remains a roadblock toward practical applications. We present a wafer-scale approach to creating piezoelectric biomaterial thin films based on γ-glycine crystals. The thin film has a sandwich structure, where a crystalline glycine layer self-assembles and automatically aligns between two polyvinyl alcohol (PVA) thin films. The heterostructured glycine-PVA films exhibit piezoelectric coefficients of 5.3 picocoulombs per newton or 157.5 × 10⁻³ volt meters per newton and nearly an order of magnitude enhancement of the mechanical flexibility compared with pure glycine crystals. With its natural compatibility and degradability in physiological environments, glycine-PVA films may enable the development of transient implantable electromechanical devices.

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来源期刊

Science 综合性期刊-综合性期刊

CiteScore

61.10

自引率

0.90%

发文量

审稿时长

2.1 months

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