Figure 1.

(A) SEM image showing a top view 3D-printed scaffold (1 cm × 1 cm). A top-view photograph is shown as an inset. (B) SEM image showing a cross-section of the scaffold. A side-view photograph is shown as an inset. (C) SERS maps based on the intensity of the MBA peak at 1084 cm^–1, showing details of the XY plane (focused on the second layer of the scaffold) and corresponding XZ and YZ planes, defined by green lines (scale bars: 400 μm).