Figure 6.
(a) Low- and (b) high-magnified SEM images of the mesoporous SnO2. Reprinted with permission from [57]. Copyright (2010) Elsevier Ltd.
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.