A5067954508- Glass properties and applications
- Luminescence Properties of Advanced Materials
- Lanthanide and Transition Metal Complexes
- Phase-change materials and chalcogenides
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced NMR Techniques and Applications
- Solid-state spectroscopy and crystallography
- Bone Tissue Engineering Materials
- Silk-based biomaterials and applications
- Photopolymerization techniques and applications
- Photochromic and Fluorescence Chemistry
- Soybean genetics and cultivation
- Liquid Crystal Research Advancements
- Silicone and Siloxane Chemistry
- Quantum Dots Synthesis And Properties
- Microwave Dielectric Ceramics Synthesis
- Zeolite Catalysis and Synthesis
- Advanced Cellulose Research Studies
- Nonlinear Optical Materials Research
- GABA and Rice Research
- biodegradable polymer synthesis and properties
- Mesoporous Materials and Catalysis
- Advanced Drug Delivery Systems
- Conducting polymers and applications
Universidade Estadual Paulista (Unesp)
2016-2025
Instituto de Botânica
2020-2021
Universidade de São Paulo
2008-2021
Universidade Cidade de São Paulo
2021
Centro Universitário de Araraquara
2013-2020
Université Laval
2016
University of Münster
2007
Vitreous samples were prepared in the (100 - x)% NaPO(3)-x% MoO(3) (0 <or= x 70) glass-forming system by a modified melt method that allowed good optical quality to be obtained. The structural evolution of vitreous network was monitored as function composition differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FT-IR), Raman scattering, and solid-state nuclear magnetic resonance (NMR) for (31)P, (23)Na, (95)Mo nuclei. Addition NaPO(3) glass leads pronounced...
Zidovudine (AZT) is the antiretroviral drug most frequently used for treatment of Acquired Immunodeficiency Syndrome. Its low oral bioavailability demands development innovative strategies to overcome first pass metabolism. The nasal route an option enhanced therapeutic efficacy and reduce extent first-pass effect. In this article, AZT loaded chitosan nanoparticles were prepared by a modified ionotropic gelation method with sodium tripolyphosphate. increase proportion CS (NP1 10:01 (w/w))...
Lithium ion-containing Na+ Super Ionic Conductor (NASICON) electrolytes are important materials for new energy-storage technologies. The NASICON abbreviation represents several compounds with similar structures applied as solid electrolytes, including those conductors of lithium ions. Different methods have been used to synthesize these materials, well innumerous other form the electrolyte in its final shape. synthesis and processing techniques significantly affect microstructure...
Despite significant ongoing efforts to develop luminescent rare‐earth β‐diketonate complexes, achieving thermal stability remains a persistent challenge. In this study, we present thermally stable organic‐inorganic hybrid (OIH) compound, SiCO‐[Eu(tta)3(H2O)2], where tta = thenoyltrifluoroacetonate, Si 3‐(triethoxysilyl)propyl isocyanate, and CO castor oil. Spectroscopic analysis reveals that while [Eu(tta)3(H2O)2] in its powder form undergoes irreversible photoluminescence quenching at 60 °C...
We report a detailed structural investigation of series fluoride-phosphate glasses with different phosphate/fluoride ratios in the system xSr(PO3)2-(100 - x)[AlF3-CaF2-SrF2-MgF2] x = 5, 10, 20, 40. Raman and multinuclear solid NMR spectroscopies confirm that polyphosphate network structure is successively transformed to dominated by Al-O-P linkages increasing AlF3 content. Average numbers have been quantified 27Al/31P double-resonance techniques. The majority fluoride species are found an...
<italic>Bombyx mori</italic> silk fibroin offers unlimited opportunities for functionalization, processing, and biological integration.
We report near-infrared to ultraviolet (UV) upconversion emissions in triply-doped Gd3+–Tm3+–Yb3+ fluoride–phosphate glasses. Emission at 310 nm, originated from the Gd3+:6P7/2 → 8S7/2 transition, was observed for first time The high-purity glasses prepared exhibit extended transparency UV down 200–250 nm. mixed environment of rare-earth ions characterized by means NMR techniques using scandium as a diamagnetic mimic luminescent species, which ligand distribution quantified 45Sc{31P}...
Highly ion conducting glass-ceramics, crystallizing in the Na-superionic (NASICON) structure, have been prepared system Li1+xAlxSnyGe2-(x+y)(PO4)3 by crystallization of glassy precursor samples. For modest substitution levels (y = 0.25), these crystalline solid solutions show slightly higher electrical conductivity than corresponding samples without Sn, supporting rationale that lattice expansion associated with Ge its larger homologue Sn can enhance ionic conductivity. Higher 0.45) do not...
Perovskite quantum dots (PQDs) have revolutionized the field of perovskite solar cells in recent years. Using PQDs improves operational stability these devices, which is one their main drawbacks for applications. This factor has motivated an intense search new advances, from a fundamental aspect to improved performance devices. Therefore, developments obtained PQD are discussed, presenting challenges already overcome and upcoming tendencies research. Thus, aspects halide structures first...
In this work we explored the fabrication of flexible and transparent hybrids silk fibroin (SF) epoxy-modified siloxane for photonic applications. It is well-known that regenerated SF solutions can form free-standing films with high transparency. Although has a restricted number chemically reactive side groups, main issues as-cast pristine regard solubility into aqueous media, brittleness, low thermal stability. The design enhanced functionality but transparency triggers new opportunities on...
Ag X (As 40 S 60 ) 100-X thin films (x = 7, 15, 25, 50) were deposited on glass slides by a co-evaporation technique under vacuum.Photoinduced birefringence was induced using light provided from continuous argon-ion laser operating at 488 nm.We investigated the impact of silver concentration and power density.The structural changes after irradiation characterized Raman spectroscopy, indicating that addition induces breaking sulfur ring units favors creation Ag-S-Ag bridging bonds.During this...
Single-phase zinc aluminate (ZnAl2O4) with the spinel structure was successfully obtained by Pechini method at different calcining temperatures for 4 hours. The nanoparticles are highly crystalline no impurities related to ZnO or Al2O3 residues. microstructural environment of aluminium ions changes heat treatment temperature, as observed Fourier transform infrared spectroscopy. might present two AlO6 sites evidenced 27Al solid-state magic-angle-spinning nuclear magnetic resonance spectra....
A detailed structural investigation of two series fluoride phosphate glasses with nominal compositions 20BaF2–20SrF2–20ZnF2–xIn(PO3)3–(40 – x)InF3 (x = 0, 5, 10, and 15) 20BaF2–20SrF2–20ZnF2–10ScF3–xIn(PO3)3–(30 15, 20), both doped either 0.2 mol % Yb3+ or 0.5 Eu3+, has been conducted. As indicated by Raman scattering solid-state NMR, the network structure is dominated six-coordinated In3+, orthophosphate Q(0) species, (near) absence P–O–P connectivity. The ligand environment rare-earth ions...