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Showing 1 to 7 of 7 for “"Surfactant Layer"”.
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Electrically Controlled Formation and Release of Admicelles for Solid Phase Extraction
… which are surface adsorbed micelles and surfactant monolayers, respectively. Investigations of the electrical control of surfactants on surfaces for the purpose of analyte preconcentration prior to chromatographic analysis are presented. The surfactant layer serves as the “stationary …
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Interfacial cationic polymerization and its application in microencapsulation
… polymer film would act as a release controlling layer of the encapsulated crystals into a surrounding fluid. To date there has not been to our knowledge, any study of release control by the encapsulation of solids by direct polymerization. This thesis describes a new technique based on …
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Ultrafast Vibrational Dynamics of Water and Confined Water in Reverse Micelles
A fast vibrational energy transfer across the surfactant layer of AOT reverse micelles has been measured in small AOT reverse micelles (AOT/water/CCl 4). Most of the vibrational energy from nanodroplet water is transferred to the AOT head group and then out to the CCl4 within 10 picoseconds. The …
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The adsorptive properties of oligomeric, non-ionic surfactants from aqueous solution
Surfactants from the 'Triton' range, manufactured by Rohm and Haas, Germany, were used to study the adsorptive behaviour of non-ionic surfactants (of the alkyl polyoxyethylene type) from aqueous solution onto mineral oxide surfaces. The oligomeric distributions of the surfactants were characterised …
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Quantitative Theories of Nanocrystal Growth Processes
… 5, a theoretical investigation of the growth of surfactant-coated nanocrystals is undertaken. The surfactants create a layer around the nanocrystal that has different transport properties than the bulk solution, and therefore has a strong effect on diffusion-limited growth of nanocrystals. This …
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Engineering nanocarbon interfaces for electron transfer
… reactions through utilization of the adsorbed surfactant layer. Surfactants are commonly employed in the processing of nanoparticles to impart colloidal stability to otherwise unstable dispersions. We find that the chemical and physical properties of adsorbed surfactants influence the diazonium …
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Investigating variables affecting heap (bio)leaching through determining access to sub-surface mineral grains by micro-scale X-ray tomography
… ore on non-surface grain leaching. Addition of surfactants to the leaching solution was explored with the aim of changing surface activity to influence the penetration of the leach agent into pores and cracks in the ore. The effects of operating conditions on non-surface mineral grain leaching …