Fabrication of nanoconcave surface for cell immobilization in cell-based chip

Nanostructured surface such as nanoconcave shape can be utilized as a bioplatform to immobilize cells. In this study, we present fabrication of Au-coated nanoconcave surface and some possibility of cell immobilization. Long-range ordered periodic patterns with concave shape were formed on aluminum substrate by electrochemical anodization process. The morphology and topography of nanoconcave surface was investigated by atomic force microscopy and scanning electron microscopy. The pore-pore distance and the pore depth of nanoconcave pattern were measured at 105 +/- 5 nm and 30 +/- 2 nm, respectively. After Au deposition, the pore depth within Au-coated concave surface was 15 +/- 2 nm. The topography of HeLa cells immobilized on the nanoconcave surface was observed by AFM combined with confocal microscopy. The result expected that the Au-coated nanoconcave surface may be used as new culture substrate for cells immobilization in cell-based chip.