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.
3D gradient topography protein patterns. (a) SEM image of an aECM pattern of straight ridges with 40 degree tilted view angle. (Scale bar 100 μm) (b) Cross-section topographic profile of pattern in (a) measured by profilometry. (c)–(d) Optical dark field images of repeating 3D aECM patterns with zigzag (c) and semi-circle (d) ridges with increasing periodicity. (scale bars 200 μm)
