Fig. 1From: The effect of injection speed and serial injection on propidium iodide entry into cultured HeLa and primary neonatal fibroblast cells using lance array nanoinjectionSEM image of two rows of lances contained on the lance array silicon chip. Lances measure 10 μm in length, 1–2.5 μm in diameter, and spaced 10 μm from center to centerBack to article page