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.
(a) SEM image depicting the morphology of fabricated PVA SPTF-HA; and (b) magnified image of PVA SPTF-HA with helicoidally arranged PAN fibers. Here, 13 helicoidally arranged PAN fibrous layers with 45° ± 3° offset angle are embedded layer by layer in 5 wt% PVA/H2O solution and later dried to fabricate PVA SPTFs.
