Development of wearable self-healable strain sensor utilizing nano-composite materials for advanced sensing applications

作     者：Ibrahim, Zubair Hassan, Gul Alatawi, Abdullah A. Alwageed, Hathal Salamah Asif, Arfa 

作者机构：Int Islamic Univ Dept Elect & Comp Engn Islamabad 44000 Pakistan Int Islamic Univ Ctr Adv Elect & Photovolta Engn CAEPE Islamabad 44000 Pakistan King Abdulaziz City Sci & Technol Riyadh Saudi Arabia Jouf Univ Coll Comp & Informat Sci Sakaka Saudi Arabia 

出 版 物：《JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS》 (J Mater Sci Mater Electron)

年 卷 期：2025年第36卷第2期

页      面：1-26页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

主　　题：Nanocomposites 

摘      要：Wearable self-healable strain sensors are gaining significant attention for applications in healthcare, robotics, and human-computer interaction. However, existing sensors face key challenges, including limited healing efficiency, low sensitivity to mechanical strain, and inadequate durability under repeated stress. Addressing these limitations, this study presents a novel strain sensor combining a polyurethane (PU) substrate with magnetic iron oxide nanoparticles (MIONPs) and silver flakes to enhance self-healing capabilities and strain sensitivity. The integration of MIONPs enables a self-healing efficiency of 96.6% within 24 h, a notable improvement over previous technologies that often require longer recovery times and achieve lower healing rates. Additionally, the sensor achieves a high gauge factor of 271.4 at 35% strain, representing a fourfold increase in sensitivity compared to traditional strain sensors. The sensor s responsiveness to external magnetic fields, with a magnetic sensitivity of 0.0049 T(-)1, further expands its application potential in areas like magnetically controlled devices and soft robotics. This work significantly advances multifunctional, self-healing strain sensors by addressing current limitations and offering improved performance for long-term, sustainable applications.