A simple and convenient approach denoted as gel-deposition-precipitation (G-D-P) for the preparation of core-shell-like silica@nickel species nanoparticles was studied systematically. Core-shell-like silica@nickel species nanoparticles consisted of a Si-rich core and a Ni-rich shell. The G-D-P process included two steps: one was the deposition-precipitation of nickel over the gelled colloidal s...

ZnSe-based nanocrystals (ca. 4-5 nm in diameter) emitting in blue region (ca. 445 nm) were incorporated in spherical small silica particles (20-40 nm in diameter) by a reverse micelle method. During the preparation, alkaline solution was used to deposit the hydrolyzed alkoxide on the surface of nanocrystals. It was crucially important for this solution to include Zn(2+) ions and surfactant mole...

In this report we describe a rapid, high-yield protocol for the isolation of apical (AP) and basolateral (BL) plasma membrane domains from monolayers of bovine aortic endothelial cells (BAECs) grown on tissue culture dishes as well as microcarrier beads. Using a modified cationic colloidal silica microbead membrane-isolation procedure, which deposits a uniform silica-polyacrylate pellicle over ...

The assembly of oxide and non-oxide microcomponents from colloidal building blocks is central to a broad array of applications, including sensors, optical devices, and microelectromechanical systems (MEMS), as well as to fundamental studies of granular materials. Progress in these areas has been hindered by the availability of colloidal microcomponents of precisely tailored size, shape, and com...

Aluminum-containing mesoporous silica with hierarchical macroporous architecture (Al-MMS) was successfully prepared using a solvent evaporation method through the combination of precursor solution for synthesis of Al-containing mesoporous silica (Al-MS) and poly(methyl methacrylate) (PMMA) colloidal crystals as a hard template. The porous structure and the state of aluminum were investigated us...

Colloidal porous hosts in the form of microporous aluminosilicate (zeolite) or mesoporous silica nanoparticles are attractive materials for a wide range of potential applications, i.e. controlled release drug delivery systems. However, many fundamental challenges still remain in this relatively young research field. The following work focuses on overcoming some of the present limitations by dev...

The electrophoretic mobility and the zeta potential (ζ) of fluorescently labeled colloidal silica rods, with an aspect ratio of 3.8 and 6.1, were determined with microelectrophoresis measurements using confocal microscopy. In the case where the colloidal particles all move at the same speed parallel to the direction of the electric field, we record a xyz-stack over the whole depth of the capill...

Laboratory tests were conducted to better understand effects on the papermaking process and handsheets when recycled copy paper furnish was treated with combinations of nanofibrillated cellulose (NFC), cat-ionic starch, colloidal silica, cationic retention aid (cPAM; polyacrylamide). Dosage-response experiments helped define conditions leading favorable processing outcomes, including dewatering...