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. Backscattered electron imaging (BEI), 2700×, irregularly shaped AgS particles; Spectrum showing peaks for Ag and S
b. BEI, 7000×, irregularly shaped AuCu particle; Spectrum showing peaks for Au and Cu
