Electrodeposited nanocrystalline PbSe quantum wells: synthesis, electrical and optical properties

Hens, Z. and Kooij, E.S. and Allan, G. and Grandidier, B. and Vanmaekelbergh, D. (2005) Electrodeposited nanocrystalline PbSe quantum wells: synthesis, electrical and optical properties. Nanotechnology, 16 (4). p. 339. ISSN 0957-4484

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Abstract:	The synthesis of PbSe nanocrystals by electrodeposition on Au(111) is discussed and it is shown that the characteristics of nucleation and growth determine the electrical and optical properties of the nanocrystals. Electrodeposition of PbSe on gold occurs by a two-dimensional nucleation and growth mechanism. This results in strongly flattened structures. These nanocrystals have a staircase-like electron density of states, typical for a quantum well, and the dielectric function of the PbSe nanocrystals shows a marked dependence on the nanocrystal height. Using electronic structure calculations, we demonstrate that these observations are due to quantum confinement in one direction, in agreement with the shape of the nanocrystals.
Item Type:	Article
Copyright:	© 2005 IOP Publishing
Faculty:	Science and Technology (TNW)
Research Group:	Physics of Interfaces and Nanomaterials (PIN)
Link to this item:	http://purl.utwente.nl/publications/75171
Official URL:	http://dx.doi.org/10.1088/0957-4484/16/4/001
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