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 showing (A) single-, (B) double-, and (C) triple-turn hexagonal ring-like superstructures of hexagonal single-crystals of Co-doped ZnO NRs. Reproduced with permission from Reference (201). American Chemical Society, Copyright (2008). D and E are SEM images of the Ag2V4O11 nanorings (f) SEM images of the Ag2V4O11 microloops formed by rolling of several nanobelts. Reproduced with permission from Reference (202). American Chemical Society, Copyright (2006).
