Ethylendiamine-functionalized multi-walled carbon nanotubes prevent cationic dispersant use in the electrochemical detection of dsDNA

A more sensitive detection of DNA was obtained compared with CNT and ox-CNT when eda-CNT where used with a linear range from 5 to 60 ppm, a sensitivity of 0.0315 ± 0.0003 μA mg-1 L and a LOD of 0.971 ppm after a 10-min accumulation which is lower than that obtained previously using cationic dispersing agents. The analytical performance reported is comparable with that reported previously for cationic polymers in terms of linear range and LOD values.