Characterization of Rhodamine 6G aggregates intercalated in solid thin films of Laponite clay. 1. absorption spectroscopy

Article Abstract:

The aggregation process of Rhodamine 6G (R6G) laser dye intercalated in supported thin films of Laponite clay (Lap) by means of electronic absorption spectroscopy is analyzed. The manipulation of the recorded absorption spectra of the dye in order to normalize the dye concentration of the solid samples to a common diluted R6G loading Lap film sample used as reference is described.

Analysis, Optical properties, Clathrate compounds, Absorption spectra

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Self-diffusion and collective diffusion of charged colloids studied by dynamic light scatteringd

Article Abstract:

A microemulsion of decane droplets stabilized by a nonionic surfactant film is progressively charged by substitution of a nonionic surfactant molecule by a cationic surfactant. It is shown that the slow mode is also diffusive and suggests that its possible origin is the relaxation of local charge fluctuations via the local exchange of droplets bearing different numbers of charges.

Surface active agents, Surface Active Agent Manufacturing, Light scattering

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