| 초록 |
Wrinkling in thin films has often been studied either from the fundamental point of view or for practical applications such as smart microfluidic systems, light trapping systems to increase the efficiency of energy harvesting devices. Wrinkles have typically been generated by exploiting the difference in thermal expansion coefficients between metal and polymers, the stretching of elastomeric substrates during metal deposition, or the swelling of substrates by solvent evaporation. Here, we present a new and novel method to form wrinkles by the compressive stress during the deposition of a reactive metal on polymeric surfaces. The volume expansion during the deposition of a metal film on a polymer surface causes wrinkles to relax their residual stress by increasing the interface area. We will examine the effects of curing time of polymer surfaces on such wrinkling behavior by demonstrating three dimensional wrinkling of metal films on partially cured polymeric microstructures. |
