Anisotropic and passivation-dependent quantum confinement effects in germanium nanowires: A comparison with silicon nanowires

Article Abstract:

A study examines electronic structures of hydrogen-passivated germanium nanowires (GeNWs) along the [100], [110], [111], and [112] directions using the density functional theory within the generalized gradient approximation. Results show that the band gaps of the fully relaxed GeNWs are all direct at the smaller sizes, while those of the wires along the [112] direction remain indirect, and that the magnitude of the band gaps of the GeNWs for a given size approximately follows the order of [E.sub.g][100] > [E.sub.g][111] > [E.sub.g][112] > [E.sub.g][110].

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Germanium, Usage, Density functionals, Density functional theory, Electron configuration, Structure

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Surface chemistry of luminescent colloidal silicon nanoparticles

Article Abstract:

The two kinds of properties of the particles namely optical properties and amphiphilic properties that appear to be independent of each other at the first sight are discussed. High quantum yields of photoluminescence were found for both blue and red luminescent particles.

Quantum theory, Quantum mechanics, Luminescence

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