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.
Topology of the crystalline silk film laser ablated (a) and subsequently water washed (b). Laser exposure conditions: pulse energy Ep = 22 nJ, pulse density 100 pulses/μm (20 pulses overlapping) at a repetition rate of 100 kHz, NA = 0.26 lens.
