Figure 1.
Wide-angle powder X-ray diffractograms of (a) Fe3O4 particles, (b) Fe3O4@SiO2 microspheres, (c) Fe3O4@SiO2-NH2, and (d) Fe3O4@SiO2-NH2–Au catalyst.
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.