Figure 3.
FE-SEM images of (a) NiFe2O4; (b) CoFe2O4; (c) CuFe2O4; (d) ZnFe2O4; and (e) MnFe2O4.
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.