Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Binary Fe3O4 and Co nanoparticle assemblies and their relative size ratio effect (γ = RCo/RFe3O4). (A–C) Fe3O4 nanoparticles of 8.0 (A), 18.0 (B), and 15.7 (C) nm. (D) Co nanoparticles of 7.5 nm. (E–G) Binary assemblies of Fe3O4 and Co nanoparticles. The assembly patterns are systematically modulated as random mixtures (γ = 0.94) (E), well organized binary superlattices (γ = 0.42) (F), and phase-separated arrays (γ = 0.48) (G).
