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.
Design of a scalable culture device with individually addressable z-axial gradients. (A) Rendering of device components and assembly configuration. (B) Photolithographic patterning of hydrophilic PTFE. (C) Photographs of patterned PTFE membranes, freestanding and mounted to a transparent cassette. Scale bars represent 30 mm.
