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.
Koch-star colloidal particles of iterations 0 (a,b), 1 (c,d), 2 (e) and 3 (f) with a fractal pattern of the director field reveal nematic topological states. Panels I are taken with no polarizers; panels II are taken between crossed polarizers; panels (III) are taken between crossed polarizers and the red plate; panels IV are numerical Landau de Gennes simulations. Adapted from Ref. [93].
