Experiments were performed in the BioMaps Laboratory at the University of Paris-Saclay (France). MRI experiments were performed at 3.0 T on a USA Signa TM PET/MRI scanner (GE Healthcare Technologies Inc, Chicago, USA). Two rounds of experiments (T1 and T2 mapping) were performed after an incubation period of 30 minutes for the IONFs-C1 and IONFs-C3 samples.(39) T1 mapping was performed using an inversion recovery sequence with 6 values of inversion recovery time (50, 200, 300, 600, 1000 and 1977 ms), an echo time of 11 ms, a repetition time of 2000 and an acquisition time of 3 minutes. T2 mapping followed a GE dedicated sequence, with 16 echo times varying between 8.9 and 142 msec, a repetition time of 1200 and an acquisition time of 3:15 minutes. T1 and T2 values were measured at three regions of interest (ROIs) located at the top, middle and bottom of the sample. This was done to account for the effect of gravity and sedimentation on the blood sample.