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Atomic force microscopy of SPIO particles (A). Scan rate 0.3 Hz, scan size 1 μm2, the height of NPs is 0 (dark part)–34 (light part) nm in z axis. Image resolution is 256 pixels. TEM images (B) of densely packed condensed clusters of SPIO nanoparticles.
Abbreviations: SPIO, superparamagnetic iron oxide; TEM, transmission electron microscopy; NPs, nanoparticles.
