Fig. 6
From: Nanozyme-based aptasensors for the detection of tumor biomarkers
(A) Preparation process of MOF@Pt@MOF-H2. (B) Magnetic separation and release of cDNA chains in the presence of MCF-7 cells. (C) Planing map of ITO chamber and detection mechanism of CTCs sensor developed by DNA walkers and MOF-on-MOF nanozymes.
Reprinted with permission from [91].