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.
Three structure types of colloid-based soft materials, which exhibit tunable structural color by diffracting visible light: (A) opal composite made of 3D close-packed colloidal spheres bonded by an elastomer, (B) inverse opal made of a soft-material frame structure—here opal acts as a template for the soft material, (C) non close-packed colloidal crystal embedded in a soft material, typically a hydrogel.
