Structure, metastability, and electron density of Al lattices in light of the model of anions in metallic matrices

Article Abstract:

A theoretical investigation of the structure, stability, and electron charge density of cubic, rhomohedral, hexagonal, and monoclinic Al lattices was reported. Results were discussed in light of the so-called anions in metallic matrices (AMM) model, and indicated that, in the entire Al sublattices considered, the shortest zero-pressure Al-Al distance keeps a common value, thus providing further support for the cation recognition hypothesis of the AMM model.

Aluminum, Aluminum (Metal), Anions, Chemical properties

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Lifting the mirror symmetry of metal surfaces: Decoupling the electronic and physical manifestation of surface chirality

Article Abstract:

Optically active second harmonic generation (OA-SHG) is used to demonstrate that the adsorption of chiral molecules can reversibly and without significant structural rearrangement, measurably lift the mirror symmetry of the surface electronic structure of a metal. It is proposed that the ability of a chiral molecule to place a significant 'chiral perturbation' on the electronic structure of a surface is correlated to its adsorption geometry.

Analysis, Chirality, Electron configuration, Atomic properties

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Graphitic encapsulation of catalyst particles in carbon nanotube production

Article Abstract:

A new model for the encapsulation of catalyst metal particles by graphite layers that are obtained is proposed, for example, in low-temperature chemical vapor deposition production of carbon nanotubes (CNTs). The model graphite layers are primarily formed from the dissolved carbon atoms in the metal-carbide particle when the particle cools.

Carbon, Nanotubes

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