| Spectroscopic studies of solvothermally derived LaF3:Nd nanocrystals. | |
| | |
MedLine Citation:
|
PMID: 19205240 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
|
LaF3:Nd (0.5-10.7 mol%) nanocrystals were solvothermally synthesized and their optical properties were studied. Judd-Ofelt parameterization of the absorption spectra gave a radiative decay time of 846 micros for the 4F3/2 excited state to the four emission channels. Measured fluorescence decay curves for 5 different Nd3+ concentrations were fit with double exponential functions. The decrease in fluorescence decay time shows that concentration quenching is appreciable as the Nd3+ concentration increases. The 0.5 mol% Nd3+ concentration shows a decay time of 800 micros and a radiative quantum efficiency of 95%. For all dopant concentrations, heat-treatment (800 degrees C, 2 h) substantially increased the emission intensity by 2 to 3-orders of magnitude. This emission intensity increase is attributed to reduction in hydroxyls and homogenization of the Nd3+ coordination environment through improved crystalline perfection of the LaF3:Nd lattice. |
| | |
Authors:
|
G A Kumar; C W Chen; R E Riman |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Journal of nanoscience and nanotechnology Volume: 8 ISSN: 1533-4880 ISO Abbreviation: J Nanosci Nanotechnol Publication Date: 2008 Dec |
Date Detail:
|
Created Date: 2009-02-11 Completed Date: 2009-03-03 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 101088195 Medline TA: J Nanosci Nanotechnol Country: United States |
Other Details:
|
Languages: eng Pagination: 6558-63 Citation Subset: - |
Affiliation:
|
Department of Material Science and Engineering, Rutgers - The State University of New Jersey, Piscataway 08854-8065, New Jersey, USA. |
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: Incorporation of Sb in ZnO nanostructures through hydrothermal process.
Next Document: Red to green upconversion in Er(3+)-doped BaTiO3 nanorods.