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.
(A) Schematic showing the structural evolution of PAN during thermal treatment (white = H atoms; gray = C atoms; blue = N atoms; and red = O atoms). SEM images of (B) the as-spun PAN nanofibers and (C) carbon nanofibers produced after carbonization at 1000 °C. The inset in panel C shows a TEM image of the carbon nanofibers. (A) Reprinted with permission from ref 272. Copyright 2014 Wiley-VCH. (B and C) Reprinted with permission from ref 273. Copyright 2009 Elsevier.
