| 초록 |
Strain sensor has been spotlighted for its versatility on healthcare, soft robot, and human-robot interface. Despite of large potential demands, traditional metal-based strain gauges have limitations of stretchability (ε ≤ 2 %) and flexibility. Extensive studies have been presented for stretchable sensors using various nanomaterials and metal films. However, it is still hard to satisfy parameters such as sensitivity, stretchability, linearity, hysteresis, applicability to mass production. Herein, we propose a highly sensitive strain sensor with solution-processed metal grid structures. We investigated the effects of width and width/spacing ratio of the metal grid on piezoresistivity of the strain sensors. Our strain sensors exhibit high sensitivity (GF = 4685.9) and superior strain range (ε ≤ 5%) compared to other metal-based sensors. In addition, our metal grid strain sensors can be produced with eco-friendly and low-cost procedure, due to all water-based solution process. |
