Figure 3.
(A) XPS full spectrum of PCUs; (B) results of high-resolution P2p of PCUs; (C) curve-fitting results of high-resolution N1s of PCUs
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.