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Optical micrographs of PC12 cells treated with different MWCNTs-NGF samples (× 200).
The MWCNTs-EDA-NGF complexes significantly induce cell differentiation and the growing protuberances are long, dense, and woven into mesh-es. The density of these cells is clearly higher than that of cells cultured with MWCNTs-COOH-NGF complexes. MWCNTs: Multi-walled carbon nanotubes; EDA: ethylenediamine; NGF: nerve growth factor; h: hours.
