Interfacial Behavior of Acetalized Poly(vinyl alcohol) Monolayers Observed by Brewster Angle Microscopy and Canal Surface Viscometry

2231 Brewster angle microscopy

Purpose: The established methods for observing the morghnl-og;i nF the teer film a=~ based on ;nierfrrenc~ techniques. Since interference patterns are visible only in e pathologically thickened tear film, these techniques are not useful for the physiological tear film morphology. Methods: A ne;.approach is Brewster Angle Microscopy n-which allows the studv of ultra-thin films. In ophthalmology ...

Morphology and structural characterization of organized monolayers by Brewster angle microscopy

Brewster angle microscopy N·dodecyl·y·hydroxybutyric acid amide synchrotron X·ray grazing incidence diffraction 4'·oclyl-1,1 '-biphenyl-4·carbonilride Brewster angle microscopy has been involved in some of tho recent advances in tho field of monomolecular layers, such as the detection of a phase transition in monolayars formed by a surfactant at the solution surface, the determination of the li...

Molecular layers of a polymer at the free water surface : microscopy at the Brewster angle

A recently developed microscope, allowing the visualization of monolayers at liquid surfaces without the addition of fluorescent molecules, is used to study molecular layers of a polymer, poly(dimethylsiloxane), on water. Coexistence of domains of different surface density is observed, both at low concentrations and at concentrations above collapse. Small isolated domains are circular ; charact...

C60-propylamine adduct monolayers at the gas/water interface: A Brewster angle microscopy and x-ray scattering study

Brewster angle microscopy ~BAM!, x-ray specular reflectivity and grazing-incidence x-ray diffraction ~GID! studies of C60-propylamine adduct monolayers at the gas/water interface as a function of molecular area are reported. At large molecular areas (A.;150 Å/molecule), BAM images reveal macroscopic heterogeneity in the film, consisting of the coexistence between regions covered with uniform so...

Surface Adsorption of Polyethylene Glycol and Polyvinyl Alcohol with Variable Molecular Weights on Zinc Oxide Nanoparticles