A wearable tactile device, based on the electrical contact resistance (ECR) between the two fabric substrates, is developed in this work for continuous health monitoring. Microscale pillar structures are formed over top and bottom fabric substrates by screen-printing technique with conductive inks followed by the face-to-face assembly of top and bottom parts. The contact areas between the substrates increase after the application of an external force, resulting the increment of charge carrier conduction and reduction in ECR value. To enhance the sensitivity, the device is optimized with two different conductive inks (i.e., silver and graphene inks) to create pillar shaped microstructures resulting a higher sensitivity due to the variation in ECR. This wearable tactile sensor's practical applications also are investigated in monitoring human wrist pulses with wireless module and smartphone, showing its capability in faster response and high sensitivity for internet-of-thing and medical applications.

中文翻译：

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基于电接触电阻 (ECR) 变化机制的导电油墨在织物上开发高灵敏度可穿戴触觉传感器

在这项工作中开发了一种基于两个织物基材之间的电接触电阻 (ECR) 的可穿戴触觉设备，用于连续健康监测。通过丝网印刷技术使用导电油墨在顶部和底部织物基材上形成微型柱结构，然后面对面组装顶部和底部部件。施加外力后基板之间的接触面积增加，导致电荷载流子传导增加和ECR值降低。为了提高灵敏度，该设备使用两种不同的导电墨水（即银和石墨烯墨水）进行优化，以创建柱状微结构，由于 ECR 的变化而导致更高的灵敏度。这种可穿戴的触觉传感器'