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, up left) Single micrometric diatom frustule. (b, up right) Au nanoparticle covers homogeneously the outer and inner surfaces of the frustule. (c, down left) An enlargement of outer surface with pore size measurement. (d, down right) A smaller micrometric frustule. All images are relative to 48 h of Au deposition time
