Results 1 to 10 of about 1,809 (102)

Super Broadband at Telecom Wavelengths From RE³⁺-Doped SiO₂-Ta₂O₅ Glass Ceramics Planar Waveguides. [PDF]

Front Chem, 2022
This paper reports on the preparation of Er3+/Yb3+/Tm3+, Er3+/Yb3+/Nd3+, and Er3+/Tm3+/Nd3+ triply doped and Er3+-doped SiO2-Ta2O5 glass ceramic nanocomposites and active planar waveguides by the sol–gel process using the dip-coating technique as ...
De Oliveira Lima K, Caixeta FJ, Souza VDS, Rosa LS, Soares VDV, Crumo CA, Borin IA, Ferrari JL, Gonçalves RR.   +8 more
europepmc   +2 more sources

Upconversion rare Earths nanomaterials applied to photodynamic therapy and bioimaging. [PDF]

Front Chem, 2022
Light-based therapies and diagnoses including photodynamic therapy (PDT) have been used in many fields of medicine, including the treatment of non-oncological diseases and many types of cancer.
Rezende TKL, Barbosa HP, Dos Santos LF, de O Lima K, Alves de Matos P, Tsubone TM, Gonçalves RR, Ferrari JL.   +7 more
europepmc   +2 more sources

Single Er³⁺, Yb³⁺: KGd₃F₁₀ Nanoparticles for Nanothermometry. [PDF]

Front Chem, 2021
Among several optical non-contact thermometry methods, luminescence thermometry is the most versatile approach. Lanthanide-based luminescence nanothermometers may exploit not only downshifting, but also upconversion (UC) mechanisms.
de Oliveira Lima K, Dos Santos LF, Galvão R, Tedesco AC, de Souza Menezes L, Gonçalves RR.   +5 more
europepmc   +2 more sources

Magnetic and Highly Luminescent Heterostructures of Gd³⁺/ZnO Conjugated to GCIS/ZnS Quantum Dots for Multimodal Imaging. [PDF]

Nanomaterials (Basel), 2021
In recent years, the use of quantum dots (Qdots) to obtain biological images has attracted attention due to their excellent luminescent properties and the possibility of their association with contrast agents for magnetic resonance imaging (MRI). In this
Lallo da Silva B, Lemaire L, Benoit JP, Borges FH, Gonçalves RR, Amantino CF, Primo FL, Chiavacci LA.   +7 more
europepmc   +2 more sources

Estudo da decomposição térmica de oxalato de estrôncio dopado com cério(III) como precursor de materiais luminescentes

Ecletica Quimica, 2002
Este trabalho trata da obtenção de SrC2O4, Ce2(C2O4)3, e SrC2O4 dopado com diferentes porcentagens de Ce3+ como precursores do luminóforo azul Sr2CeO4. Os precursores preparados foram estudados por TG e DTA. Uma mistura contendo SrC2O4 e Ce2(C2O4)3 na relação 4:1 respectivamente e SrC2O4 dopado com diferentes porcentagens de Ce3+, foram tratadas ...
Jefferson L Ferrari, Ana Maria Pires, Clóvis Augusto Ribeiro   +2 more
exaly   +5 more sources

Refractive Indexes and Spectroscopic Properties to Design Er³⁺-Doped SiO₂-Ta₂O₅ Films as Multifunctional Planar Waveguide Platforms for Optical Sensors and Amplifiers. [PDF]

ACS Omega, 2021
Ferrari JL, Lima KO, Gonçalves RR.
europepmc   +2 more sources

Enhanced Upconversion Emission from K ^<b>+</b> ‑Modified NaGdF₄:Er^3<b>+</b> /Yb^3<b>+</b> Particles in Flexible Free-Standing Films for Thermal Sensing Application. [PDF]

ACS Omega
Acosta AB, de Souza VDS, Torres FR, Nicolai YM, Dos Santos LF, Caiut JMA, Gonçalves RR.   +6 more
europepmc   +2 more sources

Highly red luminescent stabilized tetragonal rare earth-doped HfO2 crystalline ceramics prepared by sol-gel

Optical Materials: X, 2022
We report high incorporation of rare earth ions (RE3+) into hafnia nanoparticles prepared by the sol–gel method and investigate how these dopants affect hafnia structure and phase transformation.
Fernanda Hediger Borges, Douglas Silva da Hora Oliveira, Giulia Paulino Hernandes, Sidney José Lima Ribeiro, Rogéria Rocha Gonçalves   +4 more
doaj   +1 more source

Uma Contribuição do Design Emocional para o Design de Superfície: um estudo de caso da ciclovia Van Gogh-Roosegaarde

ModaPalavra e-periódico, 2018
O presente artigo aborda uma contribuição do Design Emocional para o Design de Superfície. A partir da teoria "Três Níveis de Design" proposta por Norman (2008), é conduzida uma análise da ciclovia Van Gogh-Roosegaarde, na Holanda.
Victoria de Menezes Piffero, Gabriela Zubaran de Azevedo Pizzato   +1 more
doaj   +5 more sources

Fluorescence Intensity Ratio‐based temperature sensor with single Nd3 + :Y2O3 nanoparticles: Experiment and theoretical modeling

Nano Select, 2021
A thermometer based on single Nd3 + :Y2O3 nanoparticles is reported. The nanothermometer relies on the ratio of thermally coupled Nd3 + emission lines accessible by either continuous‐wave upconversion under 880 nm or downconversion under 532 nm ...
Rodrigo Galvão, Luiz F. dos Santos, Rogéria R. Gonçalves, Leonardo de S. Menezes   +3 more
doaj   +1 more source