Electrical Tunable Window Device (IMAGE)

Harvard John A. Paulson School of Engineering and Applied Sciences

Electrical Tunable Window Device

Caption

With an applied voltage, the nanowires on either side of the glass become attracted to each other and move toward each other, squeezing and deforming the soft elastomer. Because the nanowires are scattered unevenly across the surface, the elastomer deforms unevenly. That uneven roughness causes light to scatter, turning the glass opaque.

Credit

David Clarke/Harvard SEAS

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