Figure 8.
(a) Un-actuated device with quarter section removed to reveal internal structure. (b) Full device in actuated state showing orientation towards the light source. Adapted from [104]. (Online version in colour.)
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.