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,b) SEM images of HNTs/PVP fibre membrane taken under different magnification before heating, (c) SEM image of HNTs/carbon membrane after heating at 1100°C under N2, (d) SEM image of HNMs after sintering in air at 1200°C, (e,f) appearance of HNMs.
