PDMS模板

Abstract(#br)We report a simple and inexpensive method for producing super-hydrophobic surfaces through direct replication of micro/nano-structures on polydimethylsiloxane (PDMS) from a replication master prepared by ultrafast-laser texturing process. Gratings were obtained on 304L stainless steel plate using picosecond laser ablation. It has been used as a master with grating areas of different structural features. PDMS negative replica was prepared from the masters, and PDMS positive replica was prepared from the negative replica thereafter.

摘要\n钙钛矿纳米晶( Perovskite nanoparticles，NCs )由于其独特的光学性质，使光电子器件发生了革命性的变化。然而，控制和扩展这些功能往往需要一种轻管理策略，涉及额外的处理步骤。在这里，我们介绍了一种简单的方法，将钙钛矿纳米晶( NC )塑形到光子结构中，通过直接塑形活性材料来提供光管理。采用预取向聚二甲基硅氧烷( PDMS )模板诱导10nm CsPbBr3钙钛矿NC胶体自组装成大面积( 1cm2 ) 2D光子晶体，晶格间距可调，从400nm到数微米不等。光子晶体的排列有利于的光耦合到纳米晶层，从而提高钙钛矿薄膜内部的电场强度。因此，Cs Pb Br3二维光子晶体在较低的近红外光激发注量下表现出放大自发辐射( ASE )，而采用相同的胶体墨水制备的等效平板NC膜则相反。这种改善归因于光子晶体中陷光引起的多光子吸收增强。