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Mesoporous silica spheres from colloids
Journal of Colloid and Interface Science, 2007A novel method has been developed to synthesize mesoporous silica spheres using commercial silica colloids (SNOWTEX) as precursors and electrolytes (ammonium nitrate and sodium chloride) as destabilizers. Crosslinked polyacrylamide hydrogel was used as a temporary barrier to obtain dispersible spherical mesoporous silica particles.
Ho, Jenny +3 more
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Hæmolytic Activity of Colloidal Silica
Nature, 1961COLLOIDAL silica is highly toxic when administered parenterally1,2. In isolated biological systems silica has been shown to interfere with some enzymes3,4, activate blood clotting and pharmacologically active substances in plasma5 and interfere with the red cell envelope6.
J D, HARLEY, J, MARGOLIS
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Fast aggregation of colloidal silica
Physical Review A, 1990The aggregation kinetics of colloidal silica is highly dependent on conditions such as the {ital p}H and salt concentration. In this paper we investigate the aggregation of colloidal silica under conditions that promote rapid growth, contrasting our findings with earlier investigations of the slow growth of silica.
, Martin +3 more
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Structural manipulation of colloidal silica
Nanoscale, 2011Structural properties of the nanosized silica Ludox TMA with novel functionalizations have been investigated. Silica is stabilized in aqueous solution at a pH value higher than the pK(a) of silicic acid. A surface modification consisting of poly(p-benzamide)s functionalized with derivatized nucleobases on the C-terminus and cationic pyridinium ...
Jesse, Roose +3 more
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Restructuring of colloidal silica aggregates
Physical Review Letters, 1986We present experimental results showing that colloidal silica spheres can be induced to aggregate either slowly or very rapidly. The slow process always yields clusters with a fractal dimensionality ${\mathrm{d}}_{\mathrm{f}}$=2.08\ifmmode\pm\else\textpm\fi{}0.05, but the rapid process can produce clusters with either ${\mathrm{d}}_{\mathrm{f}}$=1.75 ...
, Aubert, , Cannell
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Silica Coating on Colloidal Maghemite Particles
Journal of Colloid and Interface Science, 1999Maghemite colloidal particles are coated with a silica layer using a silicon alkoxide as silica precursor. The coating process is studied by electrophoresis, quasi-elastic light scattering, nitrogen adsorption, and infrared spectrometry analyses. The conditions of complete coverage of the iron oxide particles by silica and the nature of the maghemite ...
Klotz, Michaela +4 more
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Antibody-Like Effects of Colloidal Silica
Vox Sanguinis, 1957SummarySolutions of colloidal silica react with human erythrocytes and, depending on their method of preparation, show the phenomena of agglutination, zoning, blocking, enhanced agglutination with papaintreated cells, and an effect similar to the Coombs test. Cells coated with “incomplete colloid” appear to be capable of taking up an additional coat of
P H, RENTON, J A, HANCOCK
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Optical properties of colloidal carbon and colloidal silica films
Applied Optics, 1988Colloidal silica films on glass produced by withdrawal from colloidal baths are of value as antireflection coatings. The effect of particle size on the refractive index and density of these films was determined, and the optimum particle diameter for maximum transmittance of solar radiation through glass was estimated at 45 nm.
R M, Vegners, D R, McKenzie, R J, Hunter
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Slow aggregation of colloidal silica
Physical Review A, 1987We report the results of elastic and quasielastic light scattering measurements on dilute aggregates of colloidal silica. The elastic scattering measurements indicate a fractal dimension of 2.05\ifmmode\pm\else\textpm\fi{}0.06, in agreement with previous results, but the quasielastic measurements demonstrate several novel characteristics.
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1998
Clays can lay claim to being the starting point for fine particle technology in the history of mankind. Their use in constructing shelters and in pottery manufacture far predates recorded history. Their particular crystalline structure which confers the plastic-like rheological behavior necessary for forming bricks, plugging holes, and making pottery ...
Jan-Erik Otterstedt, Dale A. Brandreth
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Clays can lay claim to being the starting point for fine particle technology in the history of mankind. Their use in constructing shelters and in pottery manufacture far predates recorded history. Their particular crystalline structure which confers the plastic-like rheological behavior necessary for forming bricks, plugging holes, and making pottery ...
Jan-Erik Otterstedt, Dale A. Brandreth
openaire +1 more source