Fig. 6.

Printing living cells with 3D acoustic tweezers. (A) Single-cell printing. After previously deposited 3T3 cells were attached to the substrate, another single cell was picked up, transported, and dropped at the desired location on the substrate (indicated by red arrow) or on top of another cell (indicated by blue arrow). The single cell adhered and spread along the surface. (B) Formation of arbitrary cell culture patterns forming a “3” “D” “A” and “T” by printing of single HeLa S3 cells via 3D acoustic tweezers. (Scale bar: 20 μm.)