Flexible strain sensors are emerging rapidly and overcoming the drawbacks of traditional strain sensors. However, many flexible sensors failed to balance the sensitivity, response time, and the desired sensing range. This work proposes a novel and cost-effective strain sensor which simultaneously achieved high sensitivity, fast response, and a good sensing range. It illustrates a prototype strain sensor realized with a nanocomposite constituting reduced graphene oxide and palladium as the primary sensing elements. These sensors were fabricated with manual screen-printing technology. The sensor exhibited an outstanding performance for the different strains ranging from 0.1% to 45%. As a result, a substantially high gauge factor around 1523 at a strain of as high as 45% and a rapid response time of 47 ms was obtained. This work demonstrated potential applications like real-time monitoring of pulse and respiration, and other physical movement detection, which become crucial parameters to be measured continuously during the COVID-19 pandemic.

柔性应变传感器正在迅速出现并克服了传统应变传感器的缺点。然而，许多灵活的传感器未能平衡灵敏度、响应时间和所需的感应范围。这项工作提出了一种新颖且具有成本效益的应变传感器，它同时实现了高灵敏度、快速响应和良好的传感范围。它说明了一个原型应变传感器，该传感器由纳米复合材料构成，该纳米复合材料构成还原氧化石墨烯和钯作为主要传感元件。这些传感器是用手工丝网印刷技术制造的。该传感器在 0.1% 至 45% 的不同应变范围内表现出出色的性能。结果，在高达 45% 的应变和 47 ms 的快速响应时间下获得了大约 1523 的相当高的应变系数。