Influence of length of alkyl chains used to passivate silver sulfide nanoparticles on two- and three-dimensional self-organization

Article Abstract:

Silver sulfide nanocrystals were synthesized in reverse micelles and coated with thioalkyl chains with various lengths to study the effect of the chain length on the self-organization of nanoparticles in monolayers. The separation between adjacent particle centers in the 2D self-assembly of silver sulfide nanoparticles was found to vary linearly with the particle radius. The 3D self-organization was found to depend on the particle concentration and the chain packing. However, the 3D growth is prevented and end gauche defects occur when the chain is too long.

Monomolecular films, Micelles, Silver compounds, Superlattices as materials, Superlattices

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Domain shapes and superlattices made of 8 nm cobalt nanocrystals: fabrication and magnetic properties

Article Abstract:

The fabrication of films oriented along the substrate and dots deposited on a film made of 8 nm cobalt nanocrystals, and the magnetic properties of these artificial structures, are presented. When a magnetic field is applied parallel to the substrate during the deposition process, the aligned nanocrystals are observed.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Cobalt, Magnetic fields, Magnetic properties

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Rings and hexagons made of nanocrystals: a Marangoni effect

Article Abstract:

The film retraction, by a whole nucleation process, drags nanocrystals due to capillary forces, and further increases the local high-density areas. Such patterns are driven by surface tension gradients that induce Benard-Marangoni instabilities in the liquid films.

All Other Miscellaneous Nonmetallic Mineral Product Manufacturing, Crystals, Optical properties, Nucleation, Nucleation (Chemistry)

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