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Title: Enhancement of Pr{sup 3+} luminescence in PbO-GeO{sub 2} glasses containing silver nanoparticles

Abstract

Pr{sup 3+}-doped PbO-GeO{sub 2} (PGO) glasses containing silver nanoparticles (NPs) were prepared and their spectroscopic characteristics were studied. The PGO samples and the nucleation of silver NP were obtained melting the starting oxide powders, quenching and annealing. Transmission electron microscopy was used to characterize the NP size distribution. Isolated silver particles with average diameter of 2 nm and aggregates with dimensions smaller than 100 nm were observed. Optical absorption and luminescence experiments were performed to investigate the properties of the composite system. Enhancement of the Pr{sup 3+} ions' luminescence was observed due to the presence of the silver NP.

Authors:
; ; ; ;  [1];  [2];  [2];  [2]
  1. Programa de Ciencia de Materiais, Universidade Federal de Pernambuco, 50740-540 Recife, PE (Brazil)
  2. (Brazil)
Publication Date:
OSTI Identifier:
20706488
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 87; Journal Issue: 24; Other Information: DOI: 10.1063/1.2143135; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION; ANNEALING; COMPOSITE MATERIALS; DOPED MATERIALS; GERMANIUM OXIDES; LEAD OXIDES; LUMINESCENCE; MELTING; METALLIC GLASSES; NANOSTRUCTURES; PARTICLE SIZE; PARTICLES; POWDERS; PRASEODYMIUM IONS; QUENCHING; REINFORCED MATERIALS; SILVER; TRANSMISSION ELECTRON MICROSCOPY; VISIBLE SPECTRA

Citation Formats

Naranjo, Luz Patricia, Araujo, Cid B. de, Malta, Oscar L., Cruz, Petrus A. Santa, Kassab, Luciana R. P., Departamento de Fisica, Universidade Federal de Pernambuco, 50670-901 Recife, PE, Departamento de Quimica Fundamental, Universidade Federal de Pernambuco, 50740-540 Recife, PE, and Laboratorio de Vidros e Datacao, Faculdade de Tecnologia de Sao Paulo-FATEC-SP, 01124-060 Sao Paulo, SP. Enhancement of Pr{sup 3+} luminescence in PbO-GeO{sub 2} glasses containing silver nanoparticles. United States: N. p., 2005. Web. doi:10.1063/1.2143135.
Naranjo, Luz Patricia, Araujo, Cid B. de, Malta, Oscar L., Cruz, Petrus A. Santa, Kassab, Luciana R. P., Departamento de Fisica, Universidade Federal de Pernambuco, 50670-901 Recife, PE, Departamento de Quimica Fundamental, Universidade Federal de Pernambuco, 50740-540 Recife, PE, & Laboratorio de Vidros e Datacao, Faculdade de Tecnologia de Sao Paulo-FATEC-SP, 01124-060 Sao Paulo, SP. Enhancement of Pr{sup 3+} luminescence in PbO-GeO{sub 2} glasses containing silver nanoparticles. United States. doi:10.1063/1.2143135.
Naranjo, Luz Patricia, Araujo, Cid B. de, Malta, Oscar L., Cruz, Petrus A. Santa, Kassab, Luciana R. P., Departamento de Fisica, Universidade Federal de Pernambuco, 50670-901 Recife, PE, Departamento de Quimica Fundamental, Universidade Federal de Pernambuco, 50740-540 Recife, PE, and Laboratorio de Vidros e Datacao, Faculdade de Tecnologia de Sao Paulo-FATEC-SP, 01124-060 Sao Paulo, SP. Mon . "Enhancement of Pr{sup 3+} luminescence in PbO-GeO{sub 2} glasses containing silver nanoparticles". United States. doi:10.1063/1.2143135.
@article{osti_20706488,
title = {Enhancement of Pr{sup 3+} luminescence in PbO-GeO{sub 2} glasses containing silver nanoparticles},
author = {Naranjo, Luz Patricia and Araujo, Cid B. de and Malta, Oscar L. and Cruz, Petrus A. Santa and Kassab, Luciana R. P. and Departamento de Fisica, Universidade Federal de Pernambuco, 50670-901 Recife, PE and Departamento de Quimica Fundamental, Universidade Federal de Pernambuco, 50740-540 Recife, PE and Laboratorio de Vidros e Datacao, Faculdade de Tecnologia de Sao Paulo-FATEC-SP, 01124-060 Sao Paulo, SP},
abstractNote = {Pr{sup 3+}-doped PbO-GeO{sub 2} (PGO) glasses containing silver nanoparticles (NPs) were prepared and their spectroscopic characteristics were studied. The PGO samples and the nucleation of silver NP were obtained melting the starting oxide powders, quenching and annealing. Transmission electron microscopy was used to characterize the NP size distribution. Isolated silver particles with average diameter of 2 nm and aggregates with dimensions smaller than 100 nm were observed. Optical absorption and luminescence experiments were performed to investigate the properties of the composite system. Enhancement of the Pr{sup 3+} ions' luminescence was observed due to the presence of the silver NP.},
doi = {10.1063/1.2143135},
journal = {Applied Physics Letters},
number = 24,
volume = 87,
place = {United States},
year = {Mon Dec 12 00:00:00 EST 2005},
month = {Mon Dec 12 00:00:00 EST 2005}
}
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  • Highlights: • Glass ceramic containing ZnAl{sub 2}O{sub 4} and YF{sub 3} nano-crystals is fabricated. • Mn{sup 2+} and Pr{sup 3+} are selectively incorporated into ZnAl{sub 2}O{sub 4} and YF{sub 3}, respectively. • The luminescence color can be tuned by adjusting the excitation wavelength. - Abstract: Glass ceramic containing spinel ZnAl{sub 2}O{sub 4}:Mn{sup 2+} and orthorhombic YF{sub 3}:Pr{sup 3+} nano-crystals has been successfully prepared by a melt-quenching technique. X-ray diffraction and transmission electron microscopy demonstrated that two nano-phases, i.e. ZnAl{sub 2}O{sub 4} and YF{sub 3}, were homogeneously distributed among the glass matrix. Importantly, the selective incorporation of Pr{sup 3+} ions intomore » the Y{sup 3+} nine-fold coordinated sites of YF{sub 3} and the segregation of Mn{sup 2+} dopants in the Zn{sup 2+} tetrahedral sites of ZnAl{sub 2}O{sub 4} were confirmed based on the excitation/emission spectra and the crystal field calculation. Under blue light excitation, both Pr{sup 3+} and Mn{sup 2+} in the glass ceramic can be simultaneously excited, and emit red and green luminescence, respectively, owing to the suppression of energy transfer between them. The luminescence color of the obtained glass ceramic can be easily tuned by adjusting the excitation wavelength. These results indicate the potential application of the glass ceramic as converting phosphor to generate white-light after coupling with the blue LED chip.« less
  • Translated from Izv. Akad. Nauk SSSR, Neorg. Mater.; 9: No. 9, The character of the change in the viscosity is correlated with the form of the phase diagram. The glasses have a refractoriness 100 to 150 deg C higher than that of glasses on a boron-lanthanum basis; like the latter, they are short'' glasses. When the components are replaced by oxides of elements of groups III-V, the refractoriness of the glasses either increases or decreases, according to the ratio of the atomization energies of the oxides and to the position of the phase diagram. The shear moduli of these glassesmore » are much higher than those of silicate glasses. However, the proportionality of the shear modulus and the softening point, characteristic of silicate systems, is also observed for germanate glasses. This is due to involvement of oxygen atoms of similar volume in elementary acts of activation of flow. (auth)« less
  • The ..mu..-methylene cluster Ru/sub 3/(CO)/sub 7/(..mu..-CH)/..mu../sub 3/-eta/sup 3/-CH/sub 2/=C=C(i-Pr))/(..mu..-PPh/sub 2/) (2) synthesized from Ru/sub 3/-(CO)/sub 8//..mu..=eta/sup 3/-CH/sub 2/=C=C(i-Pr)/(..mu..-PPh/sub 2/) (1) via reaction with diazomethane, CH/sub 2/N/sub 2/, displays a remarkable reactivity associated with the ..mu..-CH/sub 2/ group under mild conditions. Slow isomerization of 2 to the 2-isopropyl-1,3-butadienediyl cluster (..mu..-H)Ru/sub 3/(CO)/sub 7//..mu../sub 3/-eta/sup 4/-CH=C(i-Pr)C=CH/sub 2//(..mu..-PPh/sub 2/) (3) (crystal data: triclinic, space group P anti 1, a = 9.333 (2) A, b = 10.200 (1) A, c = 16.297 (2) A, ..cap alpha.. = 87.25 (1)/sup 0/, ..beta.. = 83.26 (1)/sup 0/, ..gamma.. = 64.29 (1)/sup 0/, Z = 2, R =more » 0.25, R/sub w/ = 0.029 on 5899 observed reflections) occurs under nitrogen. Cluster 3 contains a triangular Ru/sub 3/ core with ..mu..-PPh/sub 2/ and ..mu..-H groups on one edge and a four-carbon hydrocarbyl ligand derived from a CH fragment of the ..mu..-methylene bride and the allenyl ligand of 2. Under an atmosphere of CO and in the presence of methanol complex 2 yields the open allenyl cluster Ru/sub 3/(CO)/sub 9//..mu../sub 3/-eta/sup 3/-CH/sub 2/=C=C(i-Pr)/(..mu..-PPh/sub 2/) (5) and methyl acetate, both of which were characterized spectroscopically.« less