1] Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Korea [2].
1] Division of WCU Multiscale Mechanical Design, Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Korea [2].
Nat Commun. 2014;5:3137. doi: 10.1038/ncomms4137.
Membranes with nano-apertures are versatile templates that possess a wide range of electronic, optical and biomedical applications. However, such membranes have been limited to silicon-based inorganic materials to utilize standard semiconductor processes. Here we report a new type of flexible and free-standing polymeric membrane with nano-apertures by exploiting high-wettability difference and geometrical reinforcement via multiscale, multilevel architecture. In the method, polymeric membranes with various pore sizes (50-800 nm) and shapes (dots, lines) are fabricated by a hierarchical mould-based dewetting of ultraviolet-curable resins. In particular, the nano-pores are monolithically integrated on a two-level hierarchical supporting layer, allowing for the rapid (<5 min) and robust formation of multiscale and multilevel nano-apertures over large areas (2 × 2 cm(2)).
具有纳米孔径的膜是多功能模板，具有广泛的电子、光学和生物医学应用。然而，这些膜仅限于基于硅的无机材料，以利用标准的半导体工艺。在这里，我们通过利用高润湿性差异和通过多尺度、多层次结构进行几何强化，报告了一种新型的具有纳米孔径的柔性和自立式聚合物膜。在该方法中，通过分层模具的紫外光可固化树脂的去湿作用，制备出具有各种孔径（50-800nm）和形状（点、线）的聚合物膜。特别是，纳米孔整体集成在两级分层支撑层上，允许在大面积（2×2cm²）上快速（<5min）和稳健地形成多尺度和多层次的纳米孔径。
