Fig. 1.
UV–Vis spectra of 0.04, 0.2, and 1 wt% 5 nm unmodified silica nanoparticle dispersion with and without NaCl before and after contact with quartz sand or calcite grains
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.