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) SEM image of a Pt/Pd-coated tip array that was not used for writing. The inset is the SEM image of a single polymer pen. b) SEM image of the same pen array taken after 100 writing operations. The inset is the SEM image of a single polymer pen. The scale bar of both figures is 200 μm.
