Strain sensors fabricated by surface assembly of nanoparticles
Strain sensors fabricated by surface assembly of nanoparticles
复制标题
通过纳米粒子表面组装制造的应变传感器
DOI：
10.1016/j.bios.2021.113268
复制
发表时间：
2021-05-07
影响因子：
12.6
通讯作者：
Zhong, Chuan-Jian
中科院分区：
文献类型：
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作者：
Cheng, Han-Wen;Yan, Shan;Zhong, Chuan-Jian
利用柔性衬底上纳米颗粒表面组装(SAN)的颗粒间空间特性是设计和制造高灵敏度应变传感器的一个迅速崛起的研究前沿。最近，它在可穿戴传感器和皮肤电子设备中显示出了巨大的应用潜力。SANS具有分子和纳米级颗粒间空间性质的3D结构可调整性，这对有趣的应变传感器的设计具有革命性。这篇综述将全面综述用于可穿戴应用的SAN结构应变传感器的最新研究进展。它从控制柔性衬底上SAN应变传感特性的基本原理出发，通过热激活的粒子间电子隧穿和导电渗流来实现。在讨论之后，描述了传感器的制造和应变传感特性的概念验证演示。SANS中的纳米颗粒在大小、形状和组成方面是可控的，而颗粒间分子能够在颗粒间空间特性方面实现电学性质的可调。通过描述其在可穿戴生物传感器和生物电子学中的应用的几个最新实例，进一步强调了SAN衍生应变传感器的设计。在分子和器件水平上对SANS中粒子间空间特性的作用进行基本的理解是重点。会议还将讨论SAN衍生的可穿戴传感器的未来方向，揭示材料设计在探索可穿戴传感器和皮肤电子产品的新兴机遇方面的潜在范式转变。
Harnessing interparticle spatial properties of surface assembly of nanoparticles (SAN) on flexible substrates is a rapidly emerging front of research in the design and fabrication of highly-sensitive strain sensors. It has recently shown promising potentials for applications in wearable sensors and skin electronics. SANs feature 3D structural tunability of the interparticle spatial properties at both molecular and nanoscale levels, which is transformative for the design of intriguing strain sensors. This review will present a comprehensive overview of the recent research development in exploring SAN-structured strain sensors for wearable applications. It starts from the basic principle governing the strain sensing characteristics of SANs on flexible substrates in terms of thermallyactivated interparticle electron tunneling and conductive percolation. This discussion is followed by descriptions of the fabrication of the sensors and the proof-of-concept demonstrations of the strain sensing characteristics. The nanoparticles in the SANs are controllable in terms of size, shape, and composition, whereas the interparticle molecules enable the tunability of the electrical properties in terms of interparticle spatial properties. The design of SAN-derived strain sensors is further highlighted by describing several recent examples in the explorations of their applications in wearable biosensor and bioelectronics. Fundamental understanding of the role of interparticle spatial properties within SANs at both molecular and device levels is the focal point. The future direction of the SAN-derived wearable sensors will also be discussed, shining lights on a potential paradigm shift in materials design in exploring the emerging opportunities in wearable sensors and skin electronics.