Figure 4
From: Scaffolded biosensors with designed DNA nanostructures
Two-dimensional (2D) DNA probe. (a) The stem-loop-structured probe design for an electrochemical DNA (E-DNA) sensor (adapted from Fan et al.37). (b) A stem-loop-structured probe-based E-DNA sensor with enzyme amplification (adapted from Liu et al.41). (c) DNA probe with two stem-loop structures (adapted from Qu et al.51). (d) DNA probe with three stem-loop structures (adapted from Xiao et al.52). (e) DNAzyme-based 2D probe as an ion (Pb2+) sensor (adapted from Plaxco et al.53). (f) DNA aptamer-based 2D probe as an ATP sensor (adapted from Zuo et al.54). HRP, horse radish peroxidase; MB, multicolor beacons.
