Nature Photonics ( IF 35.0 ) Pub Date : 2022-10-13 , DOI: 10.1038/s41566-022-01081-0 Vincent Hahn , Pascal Rietz , Frank Hermann , Patrick Müller , Christopher Barner-Kowollik , Tobias Schlöder , Wolfgang Wenzel , Eva Blasco , Martin Wegener
High-speed high-resolution 3D printing of polymers is highly desirable for many applications, yet still technologically challenging. Today, optics-based printing is in the lead. Projection-based linear optical approaches have achieved high printing rates of around 106 voxels s–1, although at voxel volumes of >100 μm3. Scanning-based nonlinear optical approaches have achieved voxel volumes of <1 μm3, but suffer from low printing speed or high cost because of the required femtosecond lasers. Here we present an approach that we refer to as light-sheet 3D laser microprinting. It combines image projection with an AND-type optical nonlinearity based on two-colour two-step absorption. The underlying photoresin is composed of 2,3-butanedione as the photoinitiator, (2,2,6,6-tetramethylpiperidin-1-yl)oxyl as the scavenger and dipentaerythritol hexaacrylate as the multifunctional monomer. Using continuous-wave laser diodes at 440 nm wavelength for projection and a continuous-wave laser at 660 nm for the light-sheet, we achieve a peak printing rate of 7 × 106 voxels s–1 at a voxel volume of 0.55 μm3.
中文翻译:
通过双色两步吸收进行光片 3D 微打印
聚合物的高速高分辨率 3D 打印对于许多应用来说是非常理想的,但在技术上仍然具有挑战性。今天,基于光学的打印处于领先地位。基于投影的线性光学方法已经实现了大约 10 6 体素 s –1的高打印率,尽管体素体积 >100 μm 3。基于扫描的非线性光学方法已实现<1 μm 3的体素体积,但由于需要飞秒激光器,打印速度低或成本高。在这里,我们提出了一种我们称之为光片 3D 激光微打印的方法。它将图像投影与基于双色两步吸收的 AND 型光学非线性相结合。底层光树脂由作为光引发剂的 2,3-丁二酮、作为清除剂的 (2,2,6,6-四甲基哌啶-1-基)氧基和作为多功能单体的二季戊四醇六丙烯酸酯组成。使用波长为 440 nm 的连续波激光二极管进行投影,使用 660 nm 的连续波激光作为光片,我们在体素体积为 0.55 μm 3时实现了 7 × 10 6 体素 s –1的峰值打印速率.