Key Laboratory of Advanced Display and System Applications of Ministry of Education , Shanghai University , Shanghai 200072 , China.
ACS Appl Mater Interfaces. 2018 Jul 11;10(27):22883-22888. doi: 10.1021/acsami.8b06519. Epub 2018 Jun 26.
We first verify the critical role of solvent evaporation on the resolution of inkjet printing. To confirm our hypothesis, we adjusted the evaporation rate gradient along the surface of adjacent droplets by controlling the drying microenvironment. Uneven solvent evaporation flux caused thermocapillary surface flow inward the space of micrometer-sized droplets and increase the air pressure, which prevented the neighboring droplets from coalescence. When reducing the droplet distance by the solvent evaporation-based method, a uniform profile could be obtained at the same time. This work brings us a step closer to resolving one of the critical bottlenecks to commercializing printed electronic goods.
我们首先验证了溶剂蒸发对喷墨打印分辨率的关键作用。为了验证我们的假设，我们通过控制干燥微环境来调整相邻液滴表面的蒸发速率梯度。不均匀的溶剂蒸发通量导致热毛细表面流向内进入微米级液滴的空间并增加空气压力，从而阻止了相邻液滴的聚结。当通过基于溶剂蒸发的方法减小液滴距离时，同时可以获得均匀的轮廓。这项工作使我们在解决将印刷电子产品商业化的关键瓶颈之一方面又迈进了一步。
