Document Detail


Temperature and pressure dependence of the optical properties of Cr(3 + )-doped Gd(3)Ga(5)O(12) nanoparticles.
MedLine Citation:
PMID:  21576777     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Since the crystal-field strength at the Cr(3 + ) site is very close to the excited-state crossover (ESCO), this work investigates the optical properties of Cr(3 + )-doped Gd(3)Ga(5)O(12) (GGG) nanoparticles as a function of temperature and pressure in order to establish the effect of the ESCO on the optical behaviour of nanocrystalline GGG. Luminescence, time-resolved emission and lifetime measurements have been performed on GGG:0.5% Cr(3 + ) nanoparticles in the 25-300 K temperature range, as well as under hydrostatic pressure up to 20 GPa. We show how low temperature and high pressure progressively transforms [Formula: see text] broadband emission into a ruby-like [Formula: see text] luminescence. This behaviour together with the lifetime dependence on pressure and temperature are explained on the basis of the spin-orbit interaction between the (4)T(2) and (2)E states of Cr(3 + ).
Authors:
R Martín-Rodríguez; R Valiente; F Rodríguez; M Bettinelli
Related Documents :
1244777 - Hemodynamic response to ganglionic blockade with pentolinium during n2o-halothane anest...
14557 - Halothane depresses baroreflex control of heart rate in man.
9387217 - Hemodynamic effects of epidural ketamine in isoflurane-anesthetized dogs.
8346817 - Isoflurane, compared to halothane or enflurane, causes increased lactate production but...
10226207 - Light-headedness and defective cardiovascular reflexes after neck radiotherapy.
11335187 - Associations of blood pressure and hypertension with lead dose measures and polymorphis...
Publication Detail:
Type:  Journal Article     Date:  2011-05-17
Journal Detail:
Title:  Nanotechnology     Volume:  22     ISSN:  1361-6528     ISO Abbreviation:  Nanotechnology     Publication Date:  2011 Jul 
Date Detail:
Created Date:  2011-05-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101241272     Medline TA:  Nanotechnology     Country:  England    
Other Details:
Languages:  eng     Pagination:  265707     Citation Subset:  IM    
Affiliation:
MALTA Consolider Team, Departamento Física Aplicada, Facultad de Ciencias, Universidad de Cantabria, Avenida de Los Castros s/n, 39005 Santander, Spain. Instituto de Condiciones Extremas (Centro Asociado CSIC ICMA Zaragoza), Santander, Spain.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Laser treatment of solution-deposited carbon nanotube thin films for improved conductivity and trans...
Next Document:  Hollow hematite nanosphere/carbon nanotube composite: mass production and its high-rate lithium stor...