Novel printing methods represent a class of emerging technologies, with applications ranging from biomedical to energy devices, attracting significant attention because of their ability to handle new classes of materials. Typically, popular printing technologies, such as inkjet printing, deposit low‐viscosity inks (1–15 mPa s). In a broad range of emerging applications, alternative printing techniques will enable the handling of materials with much higher viscosities. Here, Laser‐induced forward transfer (LIFT) is employed as a direct, nozzleless printing method, enabling the processing of fluids with viscosities far beyond the inkjet printing regime. Specifically, exploiting the capability of LIFT being a high‐speed processing technique, maintaining at the same time high printing resolution, the printing of highly viscous cyanoacrylate adhesives (from 30 to 1700 mPa s) is demonstrated achieving printing resolution down to 30 µm. The volume of the LIFT‐ejected adhesive droplets lies in the picoliter scale. As a further advantage compared with inkjet techniques, the printing resolution can be tuned on demand by adjusting the laser fluence during the process. Finally, as an application example, the attachment of chemical indicator powders (i.e., dimethylglyoxime powder) on printed adhesives patterns is illustrated, creating heavy metal sensors with remarkable fabrication facility.

中文翻译：

---

按需激光印刷的皮升大小，高粘度胶粘剂流体：超越了喷墨技术的局限性

新颖的印刷方法代表了一类新兴技术，其应用范围从生物医学到能源设备，由于它们能够处理新型材料而备受关注。通常，流行的打印技术（例如喷墨打印）会沉积低粘度墨水（1-15 mPa s）。在广泛的新兴应用中，替代印刷技术将使处理粘度更高的材料成为可能。在此，采用激光诱导正向转移（LIFT）作为直接的无喷嘴打印方法，可以处理粘度远远超出喷墨打印范围的流体。具体来说，利用LIFT作为一种高速处理技术的功能，同时保持较高的打印分辨率，高粘度氰基丙烯酸酯胶粘剂（30至1700 mPa s）的印刷已证明可实现低至30 µm的印刷分辨率。从LIFT喷射的胶滴的体积为皮升级。与喷墨技术相比的另一个优势是，可以通过在处理过程中调整激光能量密度来根据需要调整打印分辨率。最后，作为一个应用实例，说明了化学指示剂粉（即二甲基乙二肟粉）在印刷的胶粘剂图案上的附着，从而创建了具有卓越制造设施的重金属传感器。通过在处理过程中调整激光能量密度，可以根据需要调整打印分辨率。最后，作为一个应用实例，说明了化学指示剂粉（即二甲基乙二肟粉）在印刷的胶粘剂图案上的附着，从而创建了具有卓越制造设施的重金属传感器。通过在处理过程中调整激光能量密度，可以根据需要调整打印分辨率。最后，作为一个应用实例，说明了化学指示剂粉（即二甲基乙二肟粉）在印刷的胶粘剂图案上的附着，从而创建了具有卓越制造设施的重金属传感器。