Fig. 3.
(a) IP-S resist 3D printed GDVN. Stitching interfaces between the 400x400x10 µm3 units are visible as vertical (arrow 1) and horizontal (arrow 2) slices through the device. Misalignment appears at the perimeter as magnified in the inset, presumably due to free-floating regions with no support underneath. (b) Index-matched image (nozzle immersed in glycerol) showing projection of both vertical (arrow 1) and horizontal (arrow 2) stitching lines, corresponding to those shown in (a). Horizontal and vertical stitching lines cause very little disruption to continuity of features on the inner sidewall (insert). (c) 3D printed GVDN next to a U.S. dime (arrow 3).