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Restricted target accessibility and surface-induced perturbation of the aptamer structure are the main limitations in single-stranded DNA aptamer-based electrochemical sensors. Chemical labeling of the aptamer with a probe at the end of aptamer is inefficient and time-consuming. In this work, tetrahedron-structured DNA (ts-DNA) and a functionalized oligonucleotide (FO) were used to develop an electrochemiluminescence...
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