Nankali Mohammad, Rouhi Mohammadreza, Jones Joshua, Rathod Shasvat, Peng Peng
ACS Appl Mater Interfaces. 2024 Jul 31;16(30):39835-39846. doi: 10.1021/acsami.4c07529. Epub 2024 Jul 16.
Unlocking new dimensions in wearable sensor technology, this research highlights ultrasensitive stretchable strain sensors fabricated with the customized laser-induced graphene (LIG) decorated with uniformly distributed nickel nanoparticles with a fiber laser writing process. The nickel nanoparticle-incorporated LIG (Ni-NPs@LIG) strain sensors fabricated by a simple all-laser-based method utilize a commercial fiber laser. The Ni-NPs@LIG sensors showcase an impressive gauge factor, reaching up to 248 for strain values below 5%, demonstrating a sensitivity increase of up to 430% compared to the pure LIG sensors. Moreover, these sensors offer adjustable strain sensitivity based on laser fluence. The key advancement of this study lies in the direct laser writing of highly porous nickel-graphene nanostructures with adjustable properties, making them applicable across a broad range of applications. As an application demonstration, the strain sensors were employed to assess the small deformation of a pouch battery or track the large deformation of a balloon surface.
这项研究开启了可穿戴传感器技术的新维度，重点介绍了通过光纤激光写入工艺制造的超灵敏可拉伸应变传感器，该传感器采用定制的激光诱导石墨烯（LIG），并装饰有均匀分布的镍纳米颗粒。通过一种简单的全激光方法制造的含镍纳米颗粒的LIG（Ni-NPs@LIG）应变传感器使用的是商用光纤激光器。Ni-NPs@LIG传感器展现出令人印象深刻的应变系数，对于低于5%的应变值，该系数高达248，与纯LIG传感器相比，灵敏度提高了430%。此外，这些传感器可根据激光能量密度调节应变灵敏度。本研究的关键进展在于直接激光写入具有可调节特性的高度多孔镍-石墨烯纳米结构，使其适用于广泛的应用。作为应用示范，应变传感器被用于评估软包电池的微小变形或跟踪气球表面的大变形。
