Showing papers in "Colloids and Surfaces A: Physicochemical and Engineering Aspects in 2000"

TL;DR: In this article, a combination of surface plasmon-and fluorescence spectroscopy for sensor applications is described, where the resonant excitation of PSP modes at a metal/buffer-interface in a flow cell results in optical field intensities largely enhanced compared to the incoming laser light.

TL;DR: In this article, a review of the use of c-transmission electron microscopy (c-TEM) for the analysis of liposomes is presented, and several examples of how the technique has been successfully employed to visualise related amphiphilic structures, such as thread-like micelles and particles of reversed phases.

TL;DR: In this paper, the authors review the theoretical formalism and tools that allow the systematic study of kinetic and structural aspects of these sequential adsorption models and also show how the reference RSA model may be generalized to account for a variety of experimental features including particle anisotropy, polydispersity, bulk diffusive transport, gravitational effects, surface-induced conformational and orientational change, desorption, and multilayer formation.

TL;DR: In this paper, the results of a series concerning the influence of carbon surface chemical composition on paracetamol adsorption from water solutions were reported. And the results were described using very simple kinetic equation proposed by Korta and co-workers; moreover, this equation has been modified in the current paper

TL;DR: In this paper, a series of monodisperse PNIPAM/AAc microgels with different content of acrylic acid were synthesized by surfactant-free emulsion polymerization employing sonication instead of a conventional stirring technique.

TL;DR: In this paper, the effect of several parameters on flotation efficiency for separation of the emulsified oil was examined, namely, the presence of the nonionic surfactant Tween 80, used for the stabilisation of emulsions, the initial pH value, the concentration of chemical additives, such as polyelectrolytes (organic flocculants of cationic or anionic type) or ferric chloride (inorganic coagulant), and the concentrations of sodium oleate (used as flotation collector) and the recycle ratio.

TL;DR: In this paper, the characteristics of electroosmotic flow in rectangular microchannels were investigated using a 2D Poisson-Boltzmann equation and the 2D momentum equation to model the electric double layer field and the flow field.

TL;DR: In this article, the sorption of Pb and Cd(II) from aqueous solution to the montmorillonite/water interface was studied as a function of pH, for three concentrations.

TL;DR: In this paper, the analysis of this rise was performed according to the classical Washburn's equation in which the calculation of a constant term is needed in order to be able to determine contact angle of the considered liquid on the capillary wall or powders.

TL;DR: In this article, the experimental contact angle patterns for 14 solid surfaces are interpreted in terms of their solid surface tensions, and an explicit form of such a relation is obtained by modifying Berthelot's rule together with experimental data.

TL;DR: In this paper, the structure of polyelectrolyte multilayers built up by alternate adsorption of polyanions and polycations is investigated by X-ray reflectivity at the solid/air and neutron reflectivity in a solid/liquid interface.

TL;DR: The influence of droplet concentration and size on the creaming stability and rheology of monodisperse n-hexadecane oil-in-water emulsions stabilized by sodium dodeycl sulfate (SDS) was studied in this paper.

TL;DR: In this article, a reducing agent for the synthesis of metallic nanoparticles in reverse micelles is suggested, and the results show that the particles obtained are small in size (r=1-1.5 nm), and changes of absorption spectra with time or with quercetin concentration are caused by the increase of particle concentration.

TL;DR: In this paper, a poly(sodium acrylate) (PAA)-protected Ag nanoclusters were prepared by UV irradiation of an alcohol-water solution of silver perchlorate in the presence of PAA.

TL;DR: In this paper, a review of suspension polymerization is presented, with particular reference to variations in chemical composition of the component phases, as well as the relevant methods of droplet stabilisation for such systems.

TL;DR: In this paper, surface-plasmon field-enhanced fluorescence spectroscopy is applied for the detection of hybridization reactions of fluorophore-labeled 15mer target oligonucleotides from solution to surface-attached probe DNA.

TL;DR: In this paper, the surface energies and acid-base properties of unsized and sized Zoltek fiber were investigated using dynamic contact angle analysis, and it was found that the sizing on the carbon fiber tended to reduce the surface energy and cover acid base sites.

TL;DR: In this article, the authors examined the aggregation behavior of gemini surfactants on the basis of a free energy model developed by extending the theory for conventional surfactant and showed that the nonuniform charge distribution at the aggregate surface and the additional packing constraint on the tails play a central role in determining the equilibrium shape of the aggregates.

TL;DR: In this paper, the influence of different parameters such as ionic strength, divalent cations and molar mass of polyacids on the adsorption of polyelectrolytes was investigated.

TL;DR: In this article, surface dilational properties of soluble adsorption layers in a frequency range of 1-500 Hz using a new version of the oscillating bubble method are compared with measurements of foam stability.

TL;DR: In this article, chemical and structural information on the l -cysteine/Au(111) interface have been obtained by X-ray photoelectron spectroscopy (XPS) and scanning tunnelling microscopy (STM).

TL;DR: In this paper, the role of the polymer conformation and changes in it due to the presence of another polymer was investigated, and an overall mechanistic picture of dual polymer flocculation was proposed.

TL;DR: In this paper, the beads of hybrid inorganic ion exchanger: styrene supported zirconium (IV) tungstophosphate for a pesticide phosphamidon at 30, 45 and 60°C.

TL;DR: In this paper, the competitive adsorption of molybdate, selenite and selenate on γ-Al2O3 was investigated, and the results showed that the competitive anions in the binary-solute system decreases as compared to the respective density in a single anion system.

TL;DR: The physics of particle adhesion is a complex subject and depends on the interaction mechanisms and the mechanical properties of the contacting materials as discussed by the authors. But it is known that for small particles, the adhesion-induced strains can be quite large, resulting in yielding and plastic deformations.

TL;DR: In this article, a new adsorption process for As(V) ion removal from an aqueous solution was studied using molybdate impregnated chitosan beads (MICB).

TL;DR: In this article, a composite multilayer shell of charged polyelectrolytes and luminescent CdTe(S) nanocrystals was constructed via their consecutive electrostatic adsorption from solution onto micron-sized latex particles.

TL;DR: In this paper, small angle neutron scattering (SANS), viscosity and cloud point measurements of pluronics P84 and P104 copolymers were used to determine the structures of micellar structures.

TL;DR: In this paper, the authors applied subzero temperature differential scanning calorimetry (SZT-DSC) to a model nonionic water-in-oil microemulsion system based on: sucrose esters/water/1-butanol/ n -alkanes (C 12 −C 16 ).