Fig. 3From: Localized DNA tetrahedrons assisted catalytic hairpin assembly for the rapid and sensitive profiling of small extracellular vesicle-associated microRNAsA EIS and B SWV of the bare gold electrode (a); the electrode modified with capture probe (b); the modified electrode after MCH block (c); DT-CHA captured by the prepared electrode (d); LDT-CHA captured by the prepared electrode (e)Back to article page