Nanoparticle based tunable transmission devices

摘要

The variable permeable medium comprises a plurality of nanoparticles dispersed in the fluid and fluid, and the addition of an acid to the fluid causes the aggregates of the particles to aggregate and scatter the light by forming an aggregate of particles.Nanoparticles may include at least one metal oxide (titanium dioxide, zinc oxide, or zirconium dioxide, etc.).The dielectric constant of the fluid may be less than about 10.The medium can be used, for example, in a privacy glass for a conference room.For example, the acid can be electrochemically introduced by electrolysis of water to obtain a proton gradient or through an electrically active layer applied to the electrode.