| 초록 |
Numerous studies have been conducted on colorimetric strain sensors, which can detect and visualize the human motion in real time. However, achieving quantification and easy manufacturing with high flexibility is still a great challenge. Here, we develop an easily fabricated strain sensor embedded with linearly aggregated colloidal gold nanoparticles (L-AuNPs) on a thermoplastic polyurethane (TPU) film. This strain sensor is highly flexible, quantitatively sensitive, and durable. When tension is applied to the L-AuNPs embedded in the TPU film, a plasmonic shift occurs due to a change in the distance of inter-particles, which induces a color change in TPU film. Results show a significant color change at 300% tensile strength and a durable strain response through repeated testing over 1000 cycles. In addition, the strain sensor attached to the finger shows a color change by bending of the finger, indicating that the human body motion can be visualized. |
