Self-powered triboelectric nanogenerator with enhanced surface charge density for dynamic multidirectional pressure sensing†

IF 3.5 Q2 CHEMISTRY, ANALYTICAL Sensors & diagnostics Pub Date : 2024-04-02 DOI:10.1039/D4SD00019F
Jiaqi Wu, Yu Zhang and Xin Ting Zheng
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Abstract

In the rapidly evolving landscape of the internet of things (IoT) and the burgeoning field of biomedical applications, development in human–machine interfaces and human motion monitoring has accentuated the need for real-time pressure sensing. However, the challenge of developing a sensor that combines high sensitivity in the low pressure range with real-time remote sensing capability has remained a significant obstacle in both fields. Herein, a self-powered triboelectric nanogenerator (TENG) based pressure sensor (STEPs) with real-time remote sensing ability is proposed to meet these critical demands, offering high sensitivity in the range of 0–70 mmHg, catering to the needs of human–machine interface and biomedical applications. The STEPs introduces an innovative composite material, blending polydimethylsiloxane (PDMS), carbon black (CB), and polyvinylpyrrolidone (PVP) for improved sensing performance, then this is subjected to ultrasonication and degassing to ensure homogeneous dispersion. The doping of CB and PVP at optimal percentages into the PDMS matrix of the STEPs, together with a unique three-dimensional structure of the sensor, achieves an optimized surface charge density, leading to a high sensitivity 2.61 ± 0.02 mV mmHg−1, as compared with previous works. A wireless measurement and data transfer system, established between a STEPs array for multidirectional pressure sensing and a remote readout device following the Transmission Control Protocol (TCP), further enables real-time remote display of pressure readings. This research underscores the novelty and broad applicability of this sensor, with the potential to revolutionize self-powered wearable sensors in both human–machine interface and biomedical applications.

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具有增强表面电荷密度的自供电三电纳米发电机,用于动态多向压力传感
在快速发展的物联网(IoT)和蓬勃发展的生物医学应用领域,人机界面和人体运动监测的发展凸显了对实时压力传感的需求。然而,开发一种既能在低压范围内实现高灵敏度,又具有实时遥感能力的传感器仍然是这两个领域的一大障碍。本文提出了一种基于自供电三电纳米发电机(TENG)、具有实时遥感能力的压力传感器(STEPs),以满足这些关键需求,在 0-70 mmHg 范围内提供高灵敏度,满足人机界面和生物医学应用的需要。STEPs 引入了一种创新的复合材料,将聚二甲基硅氧烷 (PDMS)、炭黑 (CB) 和聚乙烯吡咯烷酮 (PVP) 混合以提高传感性能,然后对其进行超声处理和脱气,以确保均匀分散。在 STEPs 的 PDMS 基质中以最佳比例掺入 CB 和 PVP,再加上传感器独特的三维结构,实现了最佳的表面电荷密度,与之前的研究相比,灵敏度高达 2.61 ± 0.02 mV mmHg-1。用于多向压力传感的 STEPs 阵列与远程读取设备之间通过传输控制协议 (TCP) 建立了无线测量和数据传输系统,从而进一步实现了压力读数的实时远程显示。这项研究强调了这种传感器的新颖性和广泛适用性,有望彻底改变人机界面和生物医学应用中的自供电可穿戴传感器。
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Back cover Pursuing theranostics: a multimodal architecture approach. A review on Ti3C2Tx based nanocomposites for the electrochemical sensing of clinically relevant biomarkers Back cover Introduction to Supramolecular Sensors: From Molecules to Materials
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