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.
Contact angles of water droplets on the specimen surfaces. Black squares denote mean values, boxes represent standard deviations, and whiskers define the minimum and maximum values. Identical lower-case letters indicate statistically equivalent values (p > 0.05).
