High-performance biodegradable electronic devices are being investigated to address the global electronic waste problem. In this work, a fully biodegradable ferroelectric nanogenerator-driven skin sensor with ultrasensitive bimodal sensing capability based on edible porcine skin gelatine is demonstrated. The microstructure and molecular engineering of gelatine induces polarization confinement that gives rise the ferroelectric properties, resulting in a piezoelectric coefficient (d₃₃) of ≈24 pC N⁻¹ and pyroelectric coefficient of ≈13 µC m⁻²K⁻¹, which are 6 and 11.8 times higher, respectively, than those of the conventional planar gelatine. The ferroelectric gelatine skin sensor has exceptionally high pressure sensitivity (≈41 mV Pa⁻¹) and the lowest detection limit of pressure (≈0.005 Pa) and temperature (≈0.04 K) ever reported for ferroelectric sensors. In proof-of-concept tests, this device is able to sense the spatially resolved pressure, temperature, and surface texture of an unknown object, demonstrating potential for robotic skins and wearable electronics with zero waste footprint.

中文翻译：

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一种完全可生物降解的铁电皮肤传感器，来自食用猪皮明胶

正在研究高性能可生物降解电子设备以解决全球电子废物问题。在这项工作中，展示了一种基于可食用猪皮明胶的具有超灵敏双峰传感能力的完全可生物降解的铁电纳米发电机驱动的皮肤传感器。明胶的微结构和分子工程诱导极化限制，产生铁电特性，导致压电系数 ( d ₃₃ ) ≈24 pC N ^-1和热电系数 ≈13 µC m ^-2 K ^-1分别比传统平面明胶高 6 倍和 11.8 倍。铁电明胶皮肤传感器具有异常高的压力灵敏度 (≈41 mV Pa ^-1 ) 和最低的压力检测限 (≈0.005 Pa) 和温度 (≈0.04 K) 有史以来报道的铁电传感器。在概念验证测试中，该设备能够感应未知物体的空间分辨压力、温度和表面纹理，展示了机器人皮肤和可穿戴电子设备零浪费的潜力。