Designing quantum dots and quantum-dot solids

Citation
Gw. Bryant et W. Jaskolski, Designing quantum dots and quantum-dot solids, PHYSICA E, 11(2-3), 2001, pp. 72-77
Citations number
14
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA E
ISSN journal
1386-9477 → ACNP
Volume
11
Issue
2-3
Year of publication
2001
Pages
72 - 77
Database
ISI
SICI code
1386-9477(200110)11:2-3<72:DQDAQS>2.0.ZU;2-G
Abstract
To design nanocrystal nanosystems, a theory for nanocrystals is needed whic h can be applied to nanocrystals with atomic-scale variations in compositio n, structure and shape. We present an empirical tight-binding theory for na nocrystal heteronanostructures. Electronic structure and optical absorption spectra are obtained for CdS/HgS/CdS and ZnS/CdS/ZnS quantum-dot quantum-w ell barrier/well/barrier nanocrystals. Comparison with experiment shows tha t tight-binding theory provides a good description of nanosystems with mono layer variations in composition. Well/barrier and well/barrier/well nanocry stal heteronanostructures also are modeled to illustrate state and energy-l evel engineering in nanocrystal nanosystems. (C) 2001 Elsevier Science B.V. All rights reserved.