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. 2021 Sep 15;429:132472. doi: 10.1016/j.cej.2021.132472

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Fig. 2 — Characterize the construction of the biosensor by using cyclic voltammetry (A) and EIS (B). Bare GCE electrode (curve a), Au-g-C₃N₄ modified GCE (curve b), GCE modified with Au-g-C₃N₄, DNA tetrahedrons and MCH (curve c). GCE modified with Au-g-C₃N₄, DNA tetrahedrons, MCH and DNA1 (curve d). Optimization of the Exo III-aided amplification reaction time (C) and triple-strand formation at pH = 7.0 based on Hoogsteen.