TEM images of (a, b) Feridex, (c, d) Resovist, and (e, f) UW1 showing the disparity in size and distribution between commercial samples and UW samples.
(Color online) MPI magnetometer measurements taken with an excitation field of 29 mTμ 0 −1 (peak-peak) at 25 kHz. (a) PSF normalized to 1 for FWHM comparison. The arrow indicates the shoulder in sample UW2’s PSF that is due to relaxation effects; (b) harmonic spectrum normalized by iron concentration.
(Color online) (a) Third and (b) 15th harmonic of normalized signal intensity for commercial and UW MNPs of varying size. Size (d0 V ) is determined by fitting to M(H) and the horizontal bars show the 68% confidence interval of the log-normal distribution.
UW MPI measurements at 25 kHz, 29 mTμ0 −1 pp.
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