Liquid crystals stored in vials and bottles are often found to degrade with time, trapping more and more ion impurity in the materials. Here we report on our identification of a major source causing such degradation and illustrate how the electrical properties of an old batch of liquid crystal can be restored by a regenerative agent. This approach, which is demonstrated to be quite efficient, entails simply soaking the agent in the liquid crystal. © 2010 Elsevier B.V. All rights reserved.
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