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.
Suspended particle device (SPD) technologies for switchable shading and control of optical transparency. An active fluid is contained within a glass–glass laminate in which an external trigger allows for variable orientation of (a) suspended particles or (b) liquid crystals. (c) A passive fluid with variable transparency flows through a microfluidic device (adapted from [111] with permission from John Wiley and Sons).
