Yields and migration distances of reducing equivalents in the radiolysis of silica nanoparticles

Article Abstract:

The pulse radiolysis techniques are used to study the reduction of methyl viologen ions, MV(super +2), absorbed on SiO2 nanoparticles in N2O saturated colloidal suspensions. The efficiency of scavenging the electron decreases with increasing particle size, due to the increased fraction of charge recombination and trapping that occurs in the large particles, and it is estimated that no electrons will reach the surface of particles larger than 30 nm in diameter.

Analysis, Radiolysis, Nanolithography

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Controlling magnetic coupling between cobalt nanoparticles through nanoscale confinement in hexagonal mesoporous silica

Article Abstract:

Cobalt nanoparticles are incorporated into hexagonal honeycomb mesoporous study in order to examine the effect of nanoscale confinement on magnetic coupling. Remanence measurements suggest that the Co nanoparticles form ferromagnetically coupled chains, thus converting the structural anisotropy of the silica host into magnetic anisotropy in the guest.

All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Cobalt Compounds, Magnetism

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Magnetic modification of the external surfaces in the MCM-41 porous silica: synthesis, characterization and functionalization

Article Abstract:

The effect of the carboxylic acid nature on the size of the magnetic particles was examined. The magnetic particle size is primarily affected by the nature of the chelating carboxylic agent, the more hydrophobic the agent is, the larger the particle size will be, with propionic acid treatment affording the largest particles.

Carboxylic acids

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