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.
Scanning electron microscopy (SEM) images of samples with diverse doping levels. (a) Thermally exfoliated Graphene; (b) Graphene produced from precursor with mass ratio urea/GO = 0.6; (c) mass ratio urea/GO = 0.8 and (d) mass ratio urea/GO = 1.
