关键词: 聚集体, 单分子层, 表面压, 表面电势, 反射光谱, 各向异性

Abstract: Authors report on formation of J-aggregate monolayers of two cyanine dyes with the same chromophore, however, having a different net charge, after cospreading with the appropriate lipid. Authors had measured surface pressure/area, surface potential/area isotherms, reflection spectra and absorption spectra. It was found that the cationic dye in monolayers with arachidic acid showed a surface pressure dependent equilibrium between dimers and J-aggregate. The second cyanine dye with a net negative charge was spread with eicosylamine and formed the J-aggregate at very low surface pressures. The monolayers with dye B is optically anisotropic in the layer plane.

Key words: aggregate, monolayer, sur ace pressure surface potential, reflection, an-isotropic.