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.
SEM images of: (a) alginate aerogel spherical beads after scCO2 drying; (b) magnification of surface; (c) and internal porous network; (d) collapsed structure of alginate bead after freeze-drying; (e) magnification of surface; (f) and internal structure. Reprinted from [232].
