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We proposed a novel technique to reduce a viscous friction of liquid crystal (LC) confined and sheared in two sliding surfaces by using photoalignment of LC molecules near the surface. For the photoalignment, the alignment film was coated on one side of the sliding surface. The validity of the proposed technique was verified by the nanometric method that can measure shear viscosity and molecular alignment...
We have developed a method utilizing low-coherence phase-shifting interferometry (LCPSI) to directly visualize molecularly thin lubricant films coated on diamond-like carbon (DLC) surfaces. The measurement accuracy is guaranteed by the use of a low-coherence light source, a feedback-controlled phase-shifting system, and an image subtraction method. By measuring nanometer-thick perfluoropolyether films...
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