Figure 5.
(a) Illustration of hierarchical porosity in 3D printed objects. Left: schematic drawing. Middle: macro-pores under SEM. Right: micro-pores under SEM. (b) Optical images of 3D printed PDMS sponge structures [140].
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.