FTH1 and neoplasm: TEM images revealed that all the NCs possessed a nanosphere‐like shape with a uniform size distribution, and DLS analysis revealed the hydrodynamic diameter of FTH1 NCs (11.2 ± 1.0 nm), FTH1/YM155 NCs (14.4 ± 1.6 nm), FTS NCs (28.1 ± 3.2 nm), and FTS/YM155 NCs (31.0 ± 3.4 nm); nanoparticles 10–100 nm in diameter are designed specifically for intravenous delivery and can be enriched in tumor tissues.34