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Designing Nanocrystal Nanosystems: Quantum‐Dot Quantum‐Wells to Quantum‐Dot Solids
Author(s) -
Bryant G.W.,
Jaskólski W.
Publication year - 2001
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/(sici)1521-3951(200104)224:3<751::aid-pssb751>3.0.co;2-l
Subject(s) - nanocrystal , quantum dot , nanocrystalline material , materials science , nanotechnology , monolayer , absorption (acoustics) , electronic structure , physics , condensed matter physics , composite material
To design nanocrystalline nanosystems, a theory for nanocrystals is needed which can be applied to nanocrystals with atomic‐scale variations in composition, structure and shape. We present an empirical tight‐binding theory for nanocrystal heteronanostructures. Electronic structure and optical absorption spectra are obtained for CdS/HgS/CdS and ZnS/CdS/ZnS quantum‐dot quantum‐well nanocrystals. Comparison with experiment shows that tight‐binding theory provides a good description of nanosystems with monolayer variations in composition. Issues for designing nanocrystal heteronanostructures are discussed.