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. 2021 Jun 29;22(13):6997. doi: 10.3390/ijms22136997

Figure 3.

Figure 3

(A) Optical images of the four cell types (BNL-CL2, L-132, U87, and HeLa) cultured on a polydimethylsiloxane (PDMS) multi-channel cell chip with a polycaprolactone (PCL) three-dimensional (3D) scaffold. (B) SEM image of HeLa cells cultured on the PDMS multi-channel cell chip with a PCL 3D scaffold (a); scale bar: 1 mm). Partially magnified SEM image of HeLa cells cultured on the first and second floors of the 3D structure (b); scale bar: 200 µm). Partially magnified SEM image of HeLa cells cultured on the first floor of the 3D structure (c); scale bar: 50 µm). Partially magnified SEM image of the third floor of the 3D structure (d); scale bar: 10 µm).