Selective growth of hMSCs on FN-CNT nanostructures. A On the glass substrates, the phase-contrast image of hMSCs on line patterns of FN-CNT structures without swCNTs. B Immunostained by vinculins (green) of the hMSCs. Vinculins are the full of edge of FN-CNT structure. C Fluorescence image of actin (red) and vinculins (green) of the hMSCs. Also grown on bare-glass. Arrows are focal-adhesion sites. D Average result of the cell area on bare glass, CNT, FN coated bare glass, swCNT-coated glass treated FNs.