(a) Organ biodistribution data not normalized to organ mass, normalized to total radiant efficiency over all organs measured (b). Organ biodistribution data normalized to organ mass, normalized to total radiant efficiency over all organs (c). Blood circulation profiles of nanoparticles, evaluated by measuring blood samples on the IVIS. (d). Retention of NPs at 3h, as a percentage of the amount measured at t = 0. For 8a, 8b, and 8c, n = 3 and for 8d n = 6; for all experiments, ns: p > 0.05; *: p ≤ 0.05; **: p ≤ 0.01; ***: p ≤ 0.001 as determined through 2-way ANOVA with Bonferroni post-tests.