Figure 3.
(a) TEM and (b–e) SEM images showing the three-layer compartmental structure of trilayered fibers, generated with 10 wt % PVP-I/PVP (1:1 w/w) in the middle layer.
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.