Figure 4.
SEM images of CS with 1 wt % ND (a); 2 wt % ND (b); 4 wt % ND (c) and 4 wt % ND at higher magnification (d).
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.