Key Laboratory of Bionic Engineering (Ministry of Education), Jilin University, Changchun 130022, P. R. China.
Nanoscale. 2017 Jan 19;9(3):1166-1173. doi: 10.1039/c6nr07333f.
Functional electronics has promising applications, including highly advanced human-interactive devices and healthcare monitoring. Here, we present a unique printable micron-scale cracked strain sensor (PMSCSS), which is bioinspired by a spider's crack-shaped lyriform slit organ. The PMSCSS is fabricated by a facile process that utilizes screen-printing to coat carbon black (CB) ink onto a paper substrate. With a certain bending radius, a cracked morphology emerged on the solidified ink layer. The working principle of the PMSCSS is prominently attributed to the strain-dependent variation in resistance due to the reconnection-disconnection of the crack fracture surfaces. The device shows appealing performances, with superfast response times (∼0.625 ms) and high sensitivity (gauge factor = 647). The response time surpasses most recent reports, and the sensitivity is comparable. We demonstrate the application of the PMSCSSs as encoders, which have good linearity and negligible hysteresis. Also, the sensor can be manipulated as a vibration detector by monitoring human-motion disturbances. According to the sensory information, some details of movements can be deduced.
功能性电子产品具有广阔的应用前景，包括高度先进的人机交互设备和医疗保健监测。在这里，我们提出了一种独特的可打印微尺度裂纹应变传感器（PMSCSS），它是受到蜘蛛的裂纹状拟气管的启发而设计的。PMSCSS 通过一种简单的工艺制造，该工艺利用丝网印刷将炭黑（CB）油墨涂覆到纸基底上。在一定的弯曲半径下，在固化的油墨层上会出现裂纹形态。PMSCSS 的工作原理主要归因于由于裂纹表面的重新连接和断开导致的电阻随应变的变化。该器件具有吸引人的性能，具有超快的响应时间（约 0.625 ms）和高灵敏度（应变系数=647）。响应时间超过了最近的大多数报道，并且灵敏度相当。我们展示了 PMSCSS 作为编码器的应用，其具有良好的线性度和可忽略的滞后。此外，该传感器可以通过监测人体运动干扰来操纵作为振动探测器。根据感官信息，可以推断出一些运动细节。
