| 초록 |
The wrinkled surface topographies generated in nature for surviving and thriving have been widely studied. To mimic this morphology, non-lithographic wrinkling instability has been established well, however, the wrinkling approaches typically are irreversible. Here, we demonstrate a facile approach to create reversible and localized actuating surface topography on the polymeric bilayer (PDMS substrate and PAN top layer) with liquid metal fillers by multiple thermal triggers, i.e., heating, light, and electrical current. The PDMS substrate with LMF dispersed can enhance thermal conductivity resulting in remote actuating wrinkles by exposing it to IR. The microchannel of PDMS filled with LM can locally actuate hierarchical topographies by applying electrical current through the LM wire. This approach to reversible wrinkling may find use in fabricating functional surfaces with tunable wettability, optical properties, and adhesion. |
