School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Shenzhen, Guangdong, 518172, P. R. China.
Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
Mater Horiz. 2021 Oct 4;8(10):2615-2653. doi: 10.1039/d1mh00615k.
In the past decade, flexible physical sensors have attracted great attention due to their wide applications in many emerging areas including health-monitoring, human-machine interfaces, smart robots, and entertainment. However, conventional sensors are typically designed to respond to a specific stimulus or a deformation along only one single axis, while directional tracking and accurate monitoring of complex multi-axis stimuli is more critical in practical applications. Multidimensional sensors with distinguishable signals for simultaneous detection of complex postures and movements in multiple directions are highly demanded for the development of wearable electronics. Recently, many efforts have been devoted to the design and fabrication of multidimensional sensors that are capable of distinguishing stimuli from different directions accurately. Benefiting from their unique decoupling mechanisms, anisotropic architectures have been proved to be promising structures for multidimensional sensing. This review summarizes the present state and advances of the design and preparation strategies for fabricating multidimensional sensors based on anisotropic conducting networks. The fabrication strategies of different anisotropic structures, the working mechanism of various types of multidimensional sensing and their corresponding unique applications are presented and discussed. The potential challenges faced by multidimensional sensors are revealed to provide an insightful outlook for the future development.
在过去的十年中，由于在健康监测、人机界面、智能机器人和娱乐等许多新兴领域的广泛应用，柔性物理传感器引起了极大的关注。然而，传统传感器通常设计用于响应单一轴上的特定刺激或变形，而在实际应用中，对复杂多轴刺激的定向跟踪和精确监测更为关键。具有可区分信号的多维传感器对于同时检测多个方向的复杂姿势和运动具有很高的要求，这对于可穿戴电子产品的发展至关重要。最近，人们致力于设计和制造能够准确区分来自不同方向的刺激的多维传感器。得益于其独特的解耦机制，各向异性结构已被证明是多维传感的有前途的结构。本综述总结了基于各向异性导电网络制造多维传感器的设计和制备策略的现状和进展。介绍和讨论了不同各向异性结构的制造策略、各种类型的多维传感的工作机制及其相应的独特应用。揭示了多维传感器面临的潜在挑战，为未来的发展提供了有见地的展望。
