Physics – Condensed Matter – Materials Science
Scientific paper
2007-09-14
Physics
Condensed Matter
Materials Science
19 pages, 3 figures, 2 tables
Scientific paper
We propose a new variety of silicon quantum dots containing fullerene-derived hollows of nearly arbitrary symmetry. Conglomerate structures are designed by connecting the quantum dots through two kinds of junctions. The quantum confinement effect is investigated using semiempirical quantum-mechanical method. It is shown that within each family of quantum dots, the band gap and the stability are inversely proportional to the particle effective size. Quantum dots inherit a wide variety of structural and symmetry properties from their parent fullerenes. The conglomerates confine electrons like quasi-molecules with a peculiar electronic structure related to the junctions. Quantum dots and their conglomerates can host guest atoms in their hollows and therefore present a new promising type of tunable photoluminescent nanomaterials.
Avramov Pavel V.
Chernozatonskii Leonid A.
Fedorov Dmitri G.
Gordon Mark S.
Sorokin Pavel B.
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