Research Article

A Novel Signal-Amplified Immunoassay for the Detection of C-Reactive Protein Using HRP-Doped Magnetic Nanoparticles as Labels with the Electrochemical Quartz Crystal Microbalance as a Detector

Figure 3

SEM images of (a) Fe3O4@SiO2, (b) Fe3O4@SiO2@Au, (c) Fe-Au MNPs-anti-CRP2/HRP signal tag, (d) c in absence (right) and presence (left) of magnetic field.
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(a)
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(b)
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(c)
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(d)