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Title: Surface states in template synthesized tin oxide nanoparticles
Author: Cabot i Codina, Andreu
Arbiol i Cobos, Jordi
Ferré, R.
Morante i Lleonart, Joan Ramon
Chen, Fanglin
Liu, Meilin
Keywords: Propietats elèctriques
Ciència dels materials
Electric properties
Materials science
Issue Date: 15-Feb-2004
Publisher: American Institute of Physics
Abstract: Tin-oxide nanoparticles with controlled narrow size distributions are synthesized while physically encapsulated inside silica mesoporous templates. By means of ultraviolet-visible spectroscopy, a redshift of the optical absorbance edge is observed. Photoluminescence measurements corroborate the existence of an optical transition at 3.2 eV. The associated band of states in the semiconductor gap is present even on template-synthesized nanopowders calcined at 800°C, which contrasts with the evolution of the gap states measured on materials obtained by other methods. The gap states are thus considered to be surface localized, disappearing with surface faceting or being hidden by the surface-to-bulk ratio decrease.
Note: Reproducció del document publicat a:
It is part of: Journal of Applied Physics, 2004, vol. 95, núm. 4, p. 2178-2180
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ISSN: 0021-8979
Appears in Collections:Articles publicats en revistes (Enginyeria Electrònica i Biomèdica)

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