Abstract
A ferrocene-switched electrochemiluminescence "off-on" sensor is proposed on the basis of target transduction and a DNA walking machine for the sensitive detection of cardiac troponin I (cTnI). The proposed method offers high selectivity with a low detection limit of 0.016 pg mL(-1), and provides a universal platform for detecting a wide range of targets, including other proteins and DNAs, by changing the molecular recognition elements to the corresponding antibodies, aptamers or DNA probes.
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