Size dependence of lattice constants of semiconductor nanocrystals

Cherian, Roby ; Mahadevan, Priya (2008) Size dependence of lattice constants of semiconductor nanocrystals Applied Physics Letters, 92 (4). Article ID 043130. ISSN 0003-6951

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Official URL: http://aip.scitation.org/doi/abs/10.1063/1.2839372...

Related URL: http://dx.doi.org/10.1063/1.2839372

Abstract

We have theoretically examined the size dependence of the equilibrium lattice constant of nanocrystals of Si, GaAs, and CdSe. While deviations from the bulk lattice constant are as large as 1%–2% for unpassivated nanocrystals of Si, the deviations drop to ~0.3%–0.4% once the surfaces are passivated. Inspite of the fact that the average equilibrium bond lengths are bulklike, we find that the nearest-neighbor bond length exhibits an unusual strain profile with bulklike bond lengths in the core and shorter (~1%) bonds at the surface.

Item Type:Article
Source:Copyright of this article belongs to American Institute of Physics.
Keywords:Nanocrystals; Lattice Constants; Chemical Bonds; II-VI Semiconductors; Lattice Theory
ID Code:102993
Deposited On:02 Feb 2018 03:54
Last Modified:02 Feb 2018 03:54

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