A�er drying the printed PDMS structures with a gentle nitrogen flow, the substrate was promptly employed to construct a glass cell with another substrate to prevent contamina�on from dust. For prin�ng LC microstructure, the alignment cell filled with LC ink was subjected to the printer a�er the alignment step. LC structures were constructed by using a 63× oil objec�ve (NA = 1.4; WD = 190 μm;