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.
Phase-contrast and SEM images of PC12 cells on PPy and PPy-NGF. A,B: PC12 cells on PPy; C,D: PC12 cells on PPy-NGF. Cells spread more on PPy-NGF as a result of increased surface roughness and the presence of PAA. Scale bars = 20 μm (A,C) and 10 μm (B,D).
