An official website of the United States government
Here's how you know
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.
Figure 2. Transmission electron microscopy image of iron-containing multiwalled carbon nanotubes.
Representative image of multiwalled carbon nanotubes (MWCNTs) grown using 200-mg ferrocene (MWCNT200). Iron is visible as dark spots located inside the tubes (arrow).