| 초록 |
Stimuli-responsive materials response to surrounding condition such as pH, temperature,humidity,electric or magnetic field. In this study, we fabricated a bilayer film that shape changes due to the difference in volume between the active layer, which shrinks by light, and the passive layer, which does not change in volume. When an IR laser is irradiated onto the film, heat is generated by the photo thermal effect of the melanin nanoparticles dispersed in the passive layer. The active layer made of poly-N-isopropylacrylamide shrinks due to the heat generated from the passive layer, and the shape of the bilayer film changes soon.Also, when the heat cools down, it returns to its original shape. The bilayer film is easy to be cut, so it can be made into a desired shape.In addition, it has fast reactivity and uses light as a stimulus source, so it can control local rather than whole film. |
