| 초록 |
Biomimetic structures represent an effective way to realize highly efficient materials or devices with unprecedented properties. This strategy, however, suffers from intrinsic trade-offs with costly and complex conventional fabrication processes, which make it difficult to widely adopt such technology for academic and industrial purposes. Here, we present a conceptually different approach—using ubiquitous materials—whereby inartificially engineered design in materials can mimic bio-inspired microstructures and substantially outperform other counterparts produced by costly microfabrication processes. Specifically, we show that the capacitor can be used as a flexible capacitive pressure sensor with high pressure sensitivity and short response time and that it can be inexpensively fabricated over large areas. Inartificial design of the surface curl and roughness and for certain conditions, the natural behavior of an elastic substrate maximizes the distinct sensor performance in terms of parameters such as sensitivity, temporal resolution, and multilevel-sensing capability, which is a step toward the realization of omnipresent electronics. |
