Supplementary information files for "Self-powered ultrasensitive and highly stretchable temperature–strain sensing composite yarns"

Supplementary files for article "Self-powered ultrasensitive and highly stretchable temperature–strain sensing composite yarns"<br><br>With the emergence of stretchable/wearable devices, functions, such as sensing, energy storage/harvesting, and electrical conduction, should ideally be carried out by a single material, while retaining its ability to withstand large elastic deformations, to create compact, functionally-integrated and autonomous systems. A new class of trimodal, stretchable yarn-based transducer formed by coating commercially available Lycra® yarns with PEDOT:PSS is presented. The material developed can sense strain (first mode), and temperature (second mode) and can power itself thermoelectrically (third mode), eliminating the need for an external power-supply. The yarns were extensively characterized and obtained an ultrahigh (gauge factor ∼3.6 × 10⁵, at 10–20% strain) and tunable (up to about 2 orders of magnitude) strain sensitivity together with a very high strain-at-break point (up to ∼1000%). These PEDOT:PSS-Lycra yarns also exhibited stable thermoelectric behavior (Seebeck coefficient of 15 μV K⁻¹), which was exploited both for temperature sensing and self-powering (∼0.5 μW, for a 10-couple module at Δ<i>T</i> ∼ 95 K). The produced material has potential to be interfaced with microcontroller-based systems to create internet-enabled, internet-of-things type devices in a variety of form factors.<br><br>© The Author(s), CC BY NC 4.0<br>

论文《自供电超灵敏高可拉伸温度-应变传感复合纱线》补充材料

随着可拉伸/可穿戴设备的兴起，理想状态下单一材料应可同时承担传感、储能/供能以及导电等功能，同时保留承受大弹性形变的能力，以构建紧凑化、功能集成化且自主化的系统。本研究报道了一种新型三模态可拉伸纱基换能器：以商用Lycra®（莱卡）纱线为基底，外涂覆PEDOT:PSS（聚3,4-乙撑二氧噻吩/聚苯乙烯磺酸）制备而成。该研发材料可实现应变传感（第一模态）、温度传感（第二模态）以及热电自供电（第三模态），无需外接电源。

研究团队对该纱线开展了全面的性能表征，结果显示其具备超高峰值应变灵敏系数（在10%~20%应变下，灵敏系数约为3.6×10⁵），且灵敏度可调，调节范围可达约2个数量级；同时具备极高的断裂应变，最高可达约1000%。该PEDOT:PSS-莱卡纱线还表现出稳定的热电性能（塞贝克系数为15 μV·K⁻¹），可同时用于温度传感与自供电（在温差ΔT≈95 K的10组耦合模块中，输出功率约为0.5 μW）。所制备的该材料有望与基于微控制器的系统集成，用于构建具备联网功能的物联网（Internet of Things）类设备，适配多种形态规格。

© The Author(s), CC BY NC 4.0