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.
Characterization of uniformity perpendicular to the gradient by AFM. Young’s moduli measured with AFM in multiple planes perpendicular to the stiffness gradient axis on hydrogels of indicated stiffness strengths (0.5, 1.7, and 2.9 kPa/mm). Blue, low-stiffness; green, mid-stiffness; red, high-stiffness ranges of each PA hydrogel.
