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![Magnetic nanotechnologies for early cancer diagnostics with liquid biopsies: a review](https://image.oaes.cc/7f7a567e-03f0-4844-8ee9-e64684ca911f/3543.fig.3.jpg)
Figure 3. Schematic set-up for the microfluidic channel based immunomagnetic separation including enzyme catalysis and electrical signal-off for detection of Salmonella (A)[43] (reprinted with permission from Elsevier); MACS tip for immunomagnetic separation consisting of rectangular Ni meshes and permanent neodymium magnets on both sides of the Ni mesh (B)[46] (reprinted with permission from Elsevier); schematic microfluidic channel design for the wash-free magnetic immunoassay for PSA using SERS droplet-based sensor for readout (C)[47] (reprinted with permission from Royal Society of Chemistry). MACS: magnetic activated cell sorting; PSA: prostate specific antigen; SERS: surface enhanced Raman scattering