Soft X-ray spectroscopy of single sized CdS nanocrystals: size confinementand electronic structure

Authors
Luning, J Rockenberger, J Eisebitt, S Rubensson, JE Karl, A Kornowski, A Weller, H Eberhardt, W
Citation
J. Luning et al., Soft X-ray spectroscopy of single sized CdS nanocrystals: size confinementand electronic structure, SOL ST COMM, 112(1), 1999, pp. 5-9
Citations number
24
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SOLID STATE COMMUNICATIONS
ISSN journal
00381098 → ACNP
Volume
112
Issue
1
Year of publication
1999
Pages
5 - 9
Database
ISI
SICI code
0038-1098(1999)112:1<5:SXSOSS>2.0.ZU;2-O
Abstract
Soft X-ray spectroscopy of CdS nanocrystals within their crystalline superl attice allows to relate unambiguously changes of the electronic structure w ith the particle size and shape which is known from single crystal X-ray di ffraction. We find that the valence and conduction band edge shift contribu te to the same extent to the total band gap opening of about 2 eV with resp ect to CdS bulk as the particle size decreases to 10 Angstrom. Taking a fin ite height of the potential walls into account, we can reproduce these resu lts within an effective mass approximation model. (C) 1999 Elsevier Science Ltd. All rights reserved.