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.
SEM images of branched double‐shelled TiO2 nanotubes in low (a) and high resolution (b). SEM image of hierarchical pine tree‐like TiO2 nanotube array (c) and its TEM image (d). (a,b) Reproduced with permission.161 Copyright 2012, Royal Society of Chemistry.(c,d) Reproduced with permission.175
