Fig. 3
characterization of MO CM Biochips a SEM image of the gold nanostructure on a glass substrate (200 nm scale bar), b SEM image of the surface of the chip after adhering γ-Fe2O3@Au nanoparticles (1 μm scale bar), c Ultraviolet–visible spectrum of the biochip after the fabrication processes of Au nanostructure, APTMS, GA and BSA and d the photo of the biochip