Figure 7. (a)–(d) Frame images of trapped PS assembly on samples S1-S4, respectively. The laser spot has been tightly focused on the sample surface with diameter as small as 1 μm. White bar: 5 μm.
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.