Document Detail


Control of luminescence emitted by Cd(1 - x)Mn(x)S nanocrystals in a glass matrix: x concentration and thermal annealing.
MedLine Citation:
PMID:  21289403     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Cd(1 - x)Mn(x)S nanocrystals (NCs) were successfully grown in a glass matrix and investigated by photoluminescence (PL), electron paramagnetic resonance (EPR) and magnetic force microscopy (MFM). We verified that the luminescent properties of these NCs can be controlled both by changing the x concentration and by thermal annealing of the samples. The EPR and PL data showed that the characteristic emission of Mn(2 + ) ions ((4)T(1)-(6)A(1)) is only observed when this magnetic impurity is substitutionally incorporated in the Cd(1 - x)Mn(x)S NC core (site S(I)). Besides, it was observed that the emission ((4)T(1)-(6)A(1)) suppression, caused by the Mn(2 + ) ion presence near the surface (site S(II)) of the Cd(1 - x)Mn(x)S NCs, is independent of the host material. The MFM images also confirmed the high quality of the Cd(1 - x)Mn(x)S NC samples, showing a uniform distribution of total magnetic moments in the nanoparticles.
Authors:
Ernesto S Freitas Neto; Noelio O Dantas; Newton M Barbosa Neto; Ilde Guedes; Felipe Chen
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Publication Detail:
Type:  Journal Article     Date:  2011-02-02
Journal Detail:
Title:  Nanotechnology     Volume:  22     ISSN:  1361-6528     ISO Abbreviation:  Nanotechnology     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-02-03     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101241272     Medline TA:  Nanotechnology     Country:  England    
Other Details:
Languages:  eng     Pagination:  105709     Citation Subset:  IM    
Affiliation:
Laboratório de Novos Materiais Isolantes e Semicondutores (LNMIS), Instituto de Física, Universidade Federal de Uberlândia, CP 593, CEP 38400-902, Uberlândia, Minas Gerais, Brazil.
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