Figure 1From: Detection of breast cancer cells using targeted magnetic nanoparticles and ultra-sensitive magnetic field sensorsCharacterization of SAO5 nanoparticles. (a) SAO5 nanoparticles were imaged by transmission electron microscopy (inset). The diameters of approximately 1,000 nanoparticles were measured, and the mean and standard deviation were determined. (b) SAO5 nanoparticles dried onto a cotton tip were measured by DC susceptometry to determine the total magnetic moment (M) as a function of applied field (B).Back to article page