Fig. 1. The voxel in TPP system and the morphology of micro/nano needle structure utilizing layer-by-layer scanning

Fig. 2. Schematic of fabricating needle structure with single voxel and structural analysis

Fig. 3. Experimental setup and sample composition

Fig. 4. Experimental results and analysis of micro/nano needle structures

Fig. 5. AFM image and morphology analysis of the tip structure

Fig. 6. Experimental results and analysis of micro/nano needle structures