Institute of Microelectronics, Tsinghua University, Beijing 10084, China.
Nanoscale. 2017 Jun 22;9(24):8266-8273. doi: 10.1039/c7nr01862b.
Conventional strain sensors rarely have both a high gauge factor and a large strain range simultaneously, so they can only be used in specific situations where only a high sensitivity or a large strain range is required. However, for detecting human motions that include both subtle and large motions, these strain sensors can't meet the diverse demands simultaneously. Here, we come up with laser patterned graphene strain sensors with self-adapted and tunable performance for the first time. A series of strain sensors with either an ultrahigh gauge factor or a preferable strain range can be fabricated simultaneously via one-step laser patterning, and are suitable for detecting all human motions. The strain sensors have a GF of up to 457 with a strain range of 35%, or have a strain range of up to 100% with a GF of 268. Most importantly, the performance of the strain sensors can be easily tuned by adjusting the patterns of the graphene, so that the sensors can meet diverse demands in both subtle and large motion situations. The graphene strain sensors show significant potential in applications such as wearable electronics, health monitoring and intelligent robots. Furthermore, the facile, fast and low-cost fabrication method will make them possible and practical to be used for commercial applications in the future.
传统的应变传感器很少同时具有高灵敏度系数和大应变范围，因此它们只能用于仅需要高灵敏度或大应变范围的特定情况。然而，对于检测包括细微运动和大运动在内的人体运动，这些应变传感器不能同时满足多样化的需求。在这里，我们首次提出了具有自适应和可调性能的激光图案化石墨烯应变传感器。通过一步激光图案化，可以同时制造出具有超高灵敏度系数或更优应变范围的一系列应变传感器，适用于检测所有人体运动。这些应变传感器的灵敏度系数高达 457，应变范围为 35%，或者应变范围高达 100%，灵敏度系数为 268。最重要的是，通过调整石墨烯的图案，可以轻松地调整应变传感器的性能，从而使传感器能够满足细微运动和大运动情况下的多样化需求。石墨烯应变传感器在可穿戴电子、健康监测和智能机器人等应用中具有重要的应用潜力。此外，这种简单、快速且低成本的制造方法将使它们在未来的商业应用中成为可能和实用。
