Quasi-elastic light scattering , interface

Finsey R., Particle sizing by quasi-elastic light scattering, Adv. Colloid Interface Set, 52, 79, 1994. 

It is very well known that the nature of the monolayer partially depends on the strength of interfacial interactions with substrate molecules and that of polymer in-tersegmental interactions. And it is normal to expect that the viscoelastic properties of polymer monolayer are also dependent on these factors. The static and dynamic properties of several different polymer monolayers at the air - water interface have been examined with the surface quasi-elastic Light Scattering technique combined with the static Wilhelmy plate method [101]. 

Gulari, E., Bedwell, B., and Alkhafaji, S., Quasi-elastic light-scattering investigation of microemulsions, J. Colloid Interface Sci., 11, 202, 1980. 

This method allowed to establish, that besides adsoption layer buildup at the interface the protein solution-organic phase, the distribution of the protein between hquid phases takes place. BSA and a-chymotrypsin at aqueous the protein solution-toluene were investigated in detail [155,156]. Transfer of the protein from the solution into interface layer as well as into organic phase was shown. In [157] the average hydrodynamic radius (r) of associates of BSA with non polar molecules in the adjacent phases of aqueous solution and hydrocarbon were determined by the quasi-elastic light scattering method. Results are given in Table 9. 

R. Finsey, Particle Sizing by Quasi Elastic Light Scattering, Adv. in Colloid and Interface ScL, 52 (1994) 79-143. 

Auweter, H., Horn, D. F., Fibre-optical Quasi-elastic Light Scattering of Concentrated Dispersion, J. Colloid Interface Set, 1985, 105, 399-409. 

The power spectrum of the light, scattered from the ice-water interface at conditions close to equilibrium, contains only Raman and Brillouin contributions. There is no Rayleigh scattering. At a critical growth rate an onset of quasi elastic light scat-... 

The capillary wave frequency is detected by an optical heterodyne technique. The laser beam, quasi-elastically scattered by the capillary wave at the liquid-liquid interface, is accompanied by a Doppler shift. The scattered beam is optically mixed with the diffracted beam from the diffraction grating to generate an optical beat in the mixed light. The beat frequency obtained here is the same as the Doppler shift, i.e., the capillary wave frequency. By selecting the order of the mixed diffracted beam, we can change the wavelength of the observed capillary wave according to Eq. (11). 

Trojanek, A., P. Krtil, and Z. Samec (2001). Quasi-elastic laser light scattering from thermally excited capillary waves on polarised liquid/liquid interfaces Part 1 Effects of adsorption of hexadecyltrimethylammonium chloride at the water/1,2-dichloroethane interface. J. Electroanal. Chem. 517, 77-84. 

---