Department of Nano Fusion Technology and BK21 Plus Nano Convergence Technology Division, Pusan National University, Busan 46241, Republic of Korea.
Nanoscale. 2018 Mar 15;10(11):5105-5113. doi: 10.1039/c7nr08118a.
Highly stretchable strain sensors that are capable of collecting complex multi-axial, multidimensional strain information in real time are crucial in practical applications for human motion detection. Here we present a highly sensitive and selective multidimensional resistive strain sensor based on a monolithic integration of a stiffness-variant stretchable substrate and sensing film comprising a cross-shaped silver nanowire percolation network in a single device. The multidimensional strain sensor efficiently distinguishes strains in various directions with a large gauge factor (GF) of >20 and a wide strain-detectable range of up to 60%. The sensor also features a maximum difference in GF between the x- and y-axes of >20 and long-term performance stability for up to 500 strain cycles. The practicality of the sensor as a human motion detector is demonstrated by attaching it directly to a part of the human body and measuring the multidimensional strains that occur during motions in real time.
高度可拉伸的应变传感器能够实时收集复杂的多轴向、多维应变信息，在人体运动检测的实际应用中至关重要。在这里，我们提出了一种基于刚度可变可拉伸基底和传感薄膜的单片集成的高度灵敏和选择性多维电阻应变传感器，该传感薄膜包含一个十字形银纳米线渗流网络。该多维应变传感器能够高效地区分各个方向的应变，具有超过 20 的大应变系数（GF）和高达 60%的宽应变检测范围。该传感器还具有 x 和 y 轴之间的 GF 最大差值超过 20，以及长达 500 个应变循环的长期性能稳定性。通过直接将传感器粘贴在人体的一部分上，并实时测量运动过程中发生的多维应变，证明了该传感器作为人体运动检测器的实用性。
