Fig. 3.

AUC sedimentation profile of A) Dox-NP™ suspension diluted in PBS, spiked with free drug B) Dox-NP™ suspension diluted 50× in PBS. Y-axis is optical absorption at 490 nm while the X axis represents radial positions (distance in cm from center of rotation) in the sample cell. The changing colour of the curves from dark blue to red corresponds to increasing centrifugation time. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)