NASA Ames Research Center , Moffett Field, California 94035, United States.
ACS Appl Mater Interfaces. 2014 Dec 10;6(23):20860-7. doi: 10.1021/am505325y. Epub 2014 Nov 24.
We present a novel approach for the room-temperature fabrication of conductive traces and their subsequent site-selective dielectric encapsulation for use in flexible electronics. We have developed an aerosol-assisted atmospheric pressure plasma-based deposition process for efficiently depositing materials on flexible substrates. Silver nanowire conductive traces and silicon dioxide dielectric coatings for encapsulation were deposited using this approach as a demonstration. The paper substrate with silver nanowires exhibited a very low change in resistance upon 50 cycles of systematic deformation, exhibiting high mechanical flexibility. The applicability of this process to print conductive traces on nonconformal 3D objects was also demonstrated through deposition on a 3D-printed thermoplastic object, indicating the potential to combine plasma printing with 3D printing technology. The role of plasma here includes activation of the material present in the aerosol for deposition, increasing the deposition rate, and plasma polymerization in the case of inorganic coatings. The demonstration here establishes a low-cost, high-throughput, and facile process for printing electronic components on nonconventional platforms.
我们提出了一种新颖的方法，可在室温下制造导电迹线，并对其进行随后的选择性介电封装，以用于柔性电子学。我们开发了一种气溶胶辅助的常压等离子体沉积工艺，可有效地在柔性基板上沉积材料。银纳米线导电迹线和二氧化硅介电涂层的沉积就是采用这种方法进行的。在 50 次系统变形循环中，带有银纳米线的纸张基板的电阻变化非常小，表现出很高的机械柔韧性。通过在 3D 打印热塑性物体上进行沉积，还证明了该工艺在非共形 3D 物体上打印导电迹线的适用性，这表明有可能将等离子体印刷与 3D 打印技术相结合。这里的等离子体的作用包括为沉积而激活气溶胶中的材料，提高沉积速率，以及在无机涂层的情况下进行等离子体聚合。这里的演示为在非常规平台上打印电子元件建立了一种低成本、高通量且简单的工艺。
