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Dispersity of MWCNTs-EDA and MWCNT-COOH-NGF complexes in PBS after more than 3 months.
(A) MWCNT-COOH [a] and MWCNTs-EDA [b]. (B) MWCNT-COOH-NGF [a] and MWCNTs-EDA-NGF [b]. MWCNTs: Multi-walled carbon nanotubes; EDA: ethylenediamine; NGF: nerve growth factor.
