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Electroordered dipole suspension

  • US 4,442,019 A
  • Filed: 01/05/1981
  • Issued: 04/10/1984
  • Est. Priority Date: 05/26/1978
  • Status: Expired due to Fees
First Claim
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1. An electrodichroic composition of matter comprising a fluid suspension of asymmetric electrically charged conductive particles in an insulating surfactant fluid, said electrically charged particles producing an electrostatic field mutually repelling said particles, said fluid suspension having a resistivity exceeding 1010 ohm-cm, said fluid suspension having a layer thickness of 3-50 μ

  • m, said fluid suspension layer having a particle concentration such that the ratio of random optical density to thickness in micrometers is between 0.08 and 0.8, a constant amplitude alternating electric voltage, said voltage being applied across said layer, said voltage being such as to produce an electrodichroic ratio of 6 to 40, where said particles form an electroordered array without particle coagulation in said fluid.

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