The authors' luminosity curves, trichromatic coefficients, mixture curves, complementary wave-lengths and their mixture in terms of luminosity, their hue-discrimination curves and some data on saturation discrimination have been obtained and the results tabulated. The importance, for visual research, of complete data for individual observers, rather than mean curves for different groups of observers, is emphasized.

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The ditetradecyldimethylammoniuim-Au(dmit)l (2C 14 -Au(dmit):J salt can be transferred onto solid substrates reproducibly up to 160 layers. The conductance of the 2CwAu(dmit)2 film of single layer does not increase by the electrochemical oxidation and is less than 10• 7 S. As for the samples with thickness more than two layers, the conductance increases with increasing the time of the electrochemical oxidation (T ox) reaching the maximum conductance, Gmax, and, then, decreases gradually. The Gmax increases from 10-{j S up to 10' 3 S with increasing the thickness in the range of 2-4 layers obeying Gmax ex: N 1 • 9 • We postulate that the macroscopic conduction paths are formed by the accumulation of the molecular layer in the thickness range of2-4layers. In the thickness range of 4-40 layers, the Gmox is approximately proportional to N (the least-square fitting gives Gmax oc Nu), indicating that the molecular layers can be oxidized uniformly to give a uniform conductivity. In the range of 40-160 layers, however, Gmmr. is almost constant with the average value of 2.04 X w-2 S, indicating that the surface layers cannot be oxidized effectively and do not contribute to the macroscopic conduction significantly if the total number oflayers is more than ea. 40.

Studies on highly conductive LB films based on ditetradecyldimethylammonium-Au(dmit) 2 [2C 14 -Au(dmit) 2 ] salt have been reviewed. The room temperature conductivity of the 2C 14 -Au(dmit) 2 LB film is as high as 40 S/cm after electro-oxidation. The resistance vs. temperature plot depends on the gap distance for the measurement. A weak metallic behavior is seen from room temperature down to 210-250 K, when the gap distance is 500 µm, while it extends down to 56-106 K, when the gap distance is 5 µm, indicating that the disorders in the film are important limiting factors for the macroscopic resistance. The data of the complex magnetic susceptibility (χ' + iχ") suggest the existence of the Meissner state below 3.9 K. Although some samples show resistance drop on cooling below 4 K, the typical resistance behaviors are of activation type at the lower temperature. We consider that disorders such as grain boundaries and/or defects are important limiting factors that should be solved to improve the electrical conduction toward the realization of global superconductivity.