José Maurício A. Caiut
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View article: Enhanced Upconversion Emission from K <sup> <b>+</b> </sup> -Modified NaGdF <sub>4</sub> :Er <sup> 3 <b>+</b> </sup> /Yb <sup> 3 <b>+</b> </sup> Particles in Flexible Free-Standing Films for Thermal Sensing Application
Enhanced Upconversion Emission from K <sup> <b>+</b> </sup> -Modified NaGdF <sub>4</sub> :Er <sup> 3 <b>+</b> </sup> /Yb <sup> 3 <b>+</b> </sup> Particles in Flexible Free-Standing Films for Thermal Sensing Application Open
View article: Free-Standing Nanopatterned Films of Silk Sericin and Gellan Gum and the Spectroscopy Studies from Eu <sup>3+</sup> -Doped Films
Free-Standing Nanopatterned Films of Silk Sericin and Gellan Gum and the Spectroscopy Studies from Eu <sup>3+</sup> -Doped Films Open
In this study, we investigated the development of flexible and nanopatterned hybrid films composed of silk sericin (SS) and gellan gum (GG) for photonic applications. GG is widely recognized for its ability to form free-standing films with…
View article: Nanostructured neodymium-based metal-organic framework for near-infrared luminescent temperature sensor
Nanostructured neodymium-based metal-organic framework for near-infrared luminescent temperature sensor Open
View article: Free-Standing Iridescent Films of Cellulose Nanocrystal Doped with Eu<sup>3+</sup> and Tb<sup>3+</sup> Ions for Photonic Applications
Free-Standing Iridescent Films of Cellulose Nanocrystal Doped with Eu<sup>3+</sup> and Tb<sup>3+</sup> Ions for Photonic Applications Open
The simultaneous integration of iridescence and light emission into a photonic material is an attractive proposal for designing novel optical devices. These properties could be controlled by the action of chiral nematic liquid crystals, an…
View article: Fast synthesis of gold nanoparticles by cold atmospheric pressure plasma jet in the presence of Au<sup>+</sup> ions and a capping agent
Fast synthesis of gold nanoparticles by cold atmospheric pressure plasma jet in the presence of Au<sup>+</sup> ions and a capping agent Open
Homogeneous gold nanoparticles were synthesized under atmospheric pressure using a non-thermal helium plasma jet in a single-step process. A current power supply was used to generate the plasma discharge rich in diverse reactive species. T…
View article: Thermal properties of nanofluids using hydrophilic and hydrophobic LiYF<sub>4</sub>:Yb/Er upconverting nanoparticles
Thermal properties of nanofluids using hydrophilic and hydrophobic LiYF<sub>4</sub>:Yb/Er upconverting nanoparticles Open
Luminescent nanoparticles have shown great potential for thermal sensing in bio-applications. The nanofluids thermal resistances were estimated, showing that the cysteine modification partially prevents heat transfer.
View article: Impact of Micropulse and Radio Frequency Coupling in an Atmospheric Pressure Plasma Jet on the Synthesis of Gold Nanoparticles
Impact of Micropulse and Radio Frequency Coupling in an Atmospheric Pressure Plasma Jet on the Synthesis of Gold Nanoparticles Open
Gold nanoparticles have been extensively studied due to their unique optical and electronic properties which make them attractive for a wide range of applications in biomedicine, electronics, and catalysis. Over the past decade, atmospheri…
View article: Metallic nanoparticles-decorated Nd Y1-Al3(BO3)4 sub-micrometric particles to enhance anti-Stokes excitation performance
Metallic nanoparticles-decorated Nd Y1-Al3(BO3)4 sub-micrometric particles to enhance anti-Stokes excitation performance Open
In the anti-Stokes excitation of trivalent rare-earth ions (RE3+), the excitation photons energy is smaller than that of a given absorption transition, and the energy mismatch can be compensated by phonons annihilation from the host lattic…
View article: Towards accurate real-time luminescence thermometry: an automated machine learning approach
Towards accurate real-time luminescence thermometry: an automated machine learning approach Open
Luminescence thermometry has been extensively exploited in the last decades both from the fundamental and applied point of views. The application of photoluminescent nanoparticles on the microscopic level based on rare-earth doped (RED) na…
View article: Metallic nanoparticles-decorated NdxY1-xAl3(BO3)4 sub-micrometric particles to enhance anti-Stokes excitation performance
Metallic nanoparticles-decorated NdxY1-xAl3(BO3)4 sub-micrometric particles to enhance anti-Stokes excitation performance Open
In the anti-Stokes excitation of trivalent rare-earth ions (RE3+), the excitation photons energy is smaller than that of a given absorption transition, and the energy mismatch can be compensated by phonons annihilation from the host lattic…
View article: Rheological and spectroscopic study of luminescent Eu3+ -doped gellan gum
Rheological and spectroscopic study of luminescent Eu3+ -doped gellan gum Open
Gellan gum (GG) can be prepared in the form of a gel and be used as a versatile and functional biomaterial. GG can come in the acetylated (HAGG) and deacetylated (LAGG) forms. There are gaps in the study of these GG matrixes associated wit…
View article: Spectroscopic study of the 4 <i>f</i> <sup>n−1</sup> 5 <i>d</i> transitions of LaPO <sub>4</sub> doped with Pr <sup>3+</sup> or co-doped with Pr <sup>3+</sup> and Gd <sup>3+</sup> in the vacuum ultra violet region
Spectroscopic study of the 4 <i>f</i> <sup>n−1</sup> 5 <i>d</i> transitions of LaPO <sub>4</sub> doped with Pr <sup>3+</sup> or co-doped with Pr <sup>3+</sup> and Gd <sup>3+</sup> in the vacuum ultra violet region Open
The energy of f-d transitions depends on the crystalline field in which the lanthanide ion is inserted. Depending on the experimental setup, these transitions could occur at high energy, so several studies regarding theoretical data have b…
View article: Simultaneous evaluation of intermittency effects, replica symmetry breaking and modes dynamics correlations in a Nd:YAG random laser
Simultaneous evaluation of intermittency effects, replica symmetry breaking and modes dynamics correlations in a Nd:YAG random laser Open
Random lasers (RLs) are remarkable experimental platforms to advance the understanding of complex systems phenomena, such as the replica-symmetry-breaking (RSB) spin glass phase, dynamics modes correlations, and turbulence. Here we study t…
View article: Silk: history, obtaining, structure and properties of an old material in the development of new technologies
Silk: history, obtaining, structure and properties of an old material in the development of new technologies Open
The silk produced in the Bombyx mori’ glands and used in the preparation of the cocoons has been employed in the textile industry millennia ago in fabric production. These cocoons are composed mainly of fibroin (SF, Silk Fibroin), a fibrou…
View article: Near-Infrared Luminescence from Visible-Light-Sensitized Ruthenium(II)-Neodymium(III) Heterobimetallic Bridged Complexes Containing Alkoxy(silyl) Functional Groups
Near-Infrared Luminescence from Visible-Light-Sensitized Ruthenium(II)-Neodymium(III) Heterobimetallic Bridged Complexes Containing Alkoxy(silyl) Functional Groups Open
New infrared emitting d-f (ruthenium(II)-neodymium(III)) heterobimetallic complexes with alkoxy(silyl) functional groups have been prepared. Visible excitation evidenced energy transfer processes from the ruthenium(II) donor to neodymium(I…
View article: Luminescent nanohybrids based on silica and silylated Ru(II)—Yb(III) heterobinuclear complex: new tools for biological media analysis
Luminescent nanohybrids based on silica and silylated Ru(II)—Yb(III) heterobinuclear complex: new tools for biological media analysis Open
Lanthanide (Ln) complexes emitting in the near-infrared (NIR) region have fostered great interest as upcoming optical tags owing to their high spatial and temporal resolution emission as well deeper light penetration in biological tissues …
View article: Near-Infrared Luminescence from Visible-Light-Sensitized Ruthenium(II)‑Neodymium(III) Heterobimetallic Bridged Complexes Containing Alkoxy(silyl) Functional Groups
Near-Infrared Luminescence from Visible-Light-Sensitized Ruthenium(II)‑Neodymium(III) Heterobimetallic Bridged Complexes Containing Alkoxy(silyl) Functional Groups Open
New infrared emitting d-f (ruthenium(II)–neodymium(III)) heterobimetallic complexes with alkoxy(silyl) functional groups have been prepared. Visible excitation evidenced energy transfer processes from the ruthenium(II) donor to neodymium(I…
View article: Near-infrared/visible-emitting nanosilica modified with silylated Ru(II) and Ln(III) complexes
Near-infrared/visible-emitting nanosilica modified with silylated Ru(II) and Ln(III) complexes Open
Three luminescent silica-based nanohybrids were fabricated by grafting of silylated Ru(II)andNd/Yb(III)complexes onto mesoporous silica nanoparticles obtained by microemulsion method.The prepared nanohybrids were characterized by Fourier t…
View article: Regenerated cellulose as a porous silica composite template for random laser emission
Regenerated cellulose as a porous silica composite template for random laser emission Open
View article: One axis guided random laser emission from a glass capillary composite
One axis guided random laser emission from a glass capillary composite Open
View article: Transparent bacterial cellulose nanocomposites used as substrate for organic light-emitting diodes
Transparent bacterial cellulose nanocomposites used as substrate for organic light-emitting diodes Open
View article: Cr3+ Doped Al2O3 Obtained by Non-Hydrolytic Sol-Gel Methodology
Cr3+ Doped Al2O3 Obtained by Non-Hydrolytic Sol-Gel Methodology Open
This paper reports the synthesis and characterization of Cr3+-doped alumina by the sol-gel non-hydrolytic methodology. The resulting sample was treated at different temperatures. X-ray diffraction revealed that the ruby phase emerged in th…
View article: Study of the energy transfer process in rare earth-doped silk fibroin for future application in luminescent compounds
Study of the energy transfer process in rare earth-doped silk fibroin for future application in luminescent compounds Open
View article: Local Coordination, Influence on Synthesis and Luminescent Features of Eu<sup>3+</sup> Ions in SiO<sub>2</sub>–Poly(methyl methacrylate) Hybrid Materials
Local Coordination, Influence on Synthesis and Luminescent Features of Eu<sup>3+</sup> Ions in SiO<sub>2</sub>–Poly(methyl methacrylate) Hybrid Materials Open
Because of the tunability of properties demonstrated by organic–inorganic hybrid materials, they have attracted considerable attention in recent years. However, despite luminescence being one of the major research topics involving hybrids,…
View article: Cr3+ Doped Al2O3 Obtained by Non-Hydrolytic Sol-Gel Methodology
Cr3+ Doped Al2O3 Obtained by Non-Hydrolytic Sol-Gel Methodology Open
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View article: One-step synthesis of luminescent YVO<sub>4</sub>:Eu<sup>3+</sup>/<i>γ</i>-Al<sub>2</sub>O<sub>3</sub>nanocomposites by spray pyrolysis
One-step synthesis of luminescent YVO<sub>4</sub>:Eu<sup>3+</sup>/<i>γ</i>-Al<sub>2</sub>O<sub>3</sub>nanocomposites by spray pyrolysis Open
Spray pyrolysis (SP) easily affords nano or sub-micro phosphor particles even on an industrial scale. However, control of the coordination environment around the emitting ion is inefficient, and the final solid matrix will dictate the symm…
View article: Bifunctional Magnetic Luminescent Particles Based on Iron Oxide Nanoparticles Grafted with a Europium Silylated Bypiridine Tris(β‐diketonate) Complex
Bifunctional Magnetic Luminescent Particles Based on Iron Oxide Nanoparticles Grafted with a Europium Silylated Bypiridine Tris(β‐diketonate) Complex Open
A new highly magnetic‐luminescent nanocomposites has been synthesized by grafting luminescent europium complex comprising tris(b‐diketone) and bypridine ligand modified with a silylil function group (Eu[(TTA) 3 (Bpy‐Si)] complex) on the su…
View article: Bifunctional silica nanoparticles for the exploration of Pseudomonas aeruginosa biofilm
Bifunctional silica nanoparticles for the exploration of Pseudomonas aeruginosa biofilm Open
International audience
View article: Multifunctional EuYVO 4 nanoparticles coated with mesoporous silica
Multifunctional EuYVO 4 nanoparticles coated with mesoporous silica Open
View article: Luminescent multifunctional hybrids obtained by grafting of ruthenium complexes on mesoporous silica
Luminescent multifunctional hybrids obtained by grafting of ruthenium complexes on mesoporous silica Open