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.
Detailed scheme of the fabrication steps and images of the corresponding representative scanning electron microscope . Carbon fiber (a), poly-silicon layer coating the carbon fiber (b), silicon oxide substrate remaining after the annealing of the carbon core (c), poly-silicon layer surrounding the silicon oxide substrate (d). Scale bars are 200 nm long
