Sidney J. L. Ribeiro
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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: Rosemary Essential Oil Microemulsion for Fungal Keratitis Treatment
Rosemary Essential Oil Microemulsion for Fungal Keratitis Treatment Open
This study investigated the use of Rosmarinus officinalis (rosemary) essential oil in a microemulsion (ME) formulation for the treatment of ocular fungal keratitis, a serious infection that can lead to blindness. The ME was characterized i…
View article: From Waste to Aerogel: Upcycling of Post-Consumer Aluminum Beer Cans into Alumina-Based Aerogels with Improved Electrochemical Storage Performance
From Waste to Aerogel: Upcycling of Post-Consumer Aluminum Beer Cans into Alumina-Based Aerogels with Improved Electrochemical Storage Performance Open
View article: Interplay between Optical and Electronic Characteristics of Castor Oil-Derived Hybrid Polymers
Interplay between Optical and Electronic Characteristics of Castor Oil-Derived Hybrid Polymers Open
View article: Biomimetic Porous Inorganic Materials for Bone Engineering Using a Natural Yam Stalk Template
Biomimetic Porous Inorganic Materials for Bone Engineering Using a Natural Yam Stalk Template Open
This study explores biomimicry as a widely recognized and promising approach for developing sustainable structural materials that embody the principles of the circular economy. In this context, the study explores using yam stalks (Diosc…
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: Cellulose Acetate Butyrate Films as a Platform for Energy Upconversion Composites: Design and Properties
Cellulose Acetate Butyrate Films as a Platform for Energy Upconversion Composites: Design and Properties Open
This study presents the development of composite films made from cellulose acetate butyrate (CAB) incorporating NaYF4:Yb3+,Er3+ upconversion particles. The films were synthesized by using a solvent casting …
View article: Core–Shell UCNP@MOF Nanoplatforms for Dual Stimuli-Responsive Doxorubicin Release
Core–Shell UCNP@MOF Nanoplatforms for Dual Stimuli-Responsive Doxorubicin Release Open
Nanocarrier systems with multifunctional capabilities hold great potential for targeted cancer therapy, particularly for breast cancer treatment. Metal-organic frameworks (MOFs) are notable for their high porosity and, in some cases, bioco…
View article: Functionalization of bacterial nanocellulose-based wound dressing for increased drug retention
Functionalization of bacterial nanocellulose-based wound dressing for increased drug retention Open
Bacterial nanocellulose is a fascinating biopolymer with immense application potential, including as a wound dressing material. It is highly biocompatible and capable of keeping humidity needed for wound healing. However, it lacks specific…
View article: Os efeitos dos inibidores de SGLT2 em pacientes portadores de insuficiência cardíaca
Os efeitos dos inibidores de SGLT2 em pacientes portadores de insuficiência cardíaca Open
Os inibidores do cotransportador de sódio-glicose 2 ou inibidores do SGLT2 são medicamentos amplamente conhecidos que foram inicialmente instituídos para o tratamento do diabetes tipo 2 pela sua ação hipoglicemiante. No entanto recentement…
View article: Nanocellulose-based materials for photonic applications [Invited]
Nanocellulose-based materials for photonic applications [Invited] Open
The escalating demand for optical and photonic devices across various sectors, encompassing energy, sustainability, medicine, information and communication technologies, is catalyzing the pursuit of renewable and eco-friendly materials. Fr…
View article: Spectroscopic and Theoretical Tools Unravel the Thermally–Stabilized Behavior of Eu<sup>3+</sup>‐Based Complex Incorporated in Sustainable Urethanesil Film
Spectroscopic and Theoretical Tools Unravel the Thermally–Stabilized Behavior of Eu<sup>3+</sup>‐Based Complex Incorporated in Sustainable Urethanesil Film Open
Despite significant ongoing efforts to develop luminescent rare‐earth β ‐diketonate complexes, achieving thermal stability remains a persistent challenge. In this study, we present a thermally stable organic‐inorganic hybrid (OIH) compound…
View article: Recycled Rare Earth Ions From E‐Waste In Borogermanate Glasses For Magneto‐Optical Applications
Recycled Rare Earth Ions From E‐Waste In Borogermanate Glasses For Magneto‐Optical Applications Open
Magneto‐optical borogermanate glasses were developed by incorporating electro‐electronic waste recovered from fluorescent lamps. Glasses with a composition of (41GeO₂–25B₂O₃–4Al₂O₃–10Na₂O–20BaO)‐x%wst, (x=0, 10, 20, 30, and 50 wt% of waste…
View article: A Ludicidade como Motivação no Processo de Ensino e Aprendizagem nas Aulas de Matemática: Geometria em Foco
A Ludicidade como Motivação no Processo de Ensino e Aprendizagem nas Aulas de Matemática: Geometria em Foco Open
View article: Pyrylazo Dye: A Novel Azo Dye Structure with Photoinduced Proton Release and Highlighted Photophysical Properties in Biological Media
Pyrylazo Dye: A Novel Azo Dye Structure with Photoinduced Proton Release and Highlighted Photophysical Properties in Biological Media Open
A straightforward method for synthesizing a stable, photoreactive, and fluorescent-probe azo dye molecule is presented, highlighting the influence of azo and pyrylium groups within the electronic structure of the novel dye. This compound, …
View article: Carbon Dot-Laponite Hybrid Nanocomposites as Selective Turn-Off Sensors for Hg<sup>2+</sup> Detection and Photoluminescence Quenching Mechanism
Carbon Dot-Laponite Hybrid Nanocomposites as Selective Turn-Off Sensors for Hg<sup>2+</sup> Detection and Photoluminescence Quenching Mechanism Open
Motivated by the importance of Hg2+ detection in water due to its harmful effect on the environment and human health, we investigated a recently developed nanocomposite based on carbon dots (CDs) and LAPONITE as an optical chemi…
View article: POLYCYSTIC OVARIAN SYNDROME - CURRENT CHALLENGES
POLYCYSTIC OVARIAN SYNDROME - CURRENT CHALLENGES Open
View article: Laponite-Modified Biopolymers as a Conformable Substrate for Optoelectronic Devices
Laponite-Modified Biopolymers as a Conformable Substrate for Optoelectronic Devices Open
Biopolymers such as carboxymethyl cellulose and hyaluronic acid are alternative substrates for conformable organic light-emitting diodes (OLEDs). However, drawbacks such as mechanical stress susceptibility can hinder the device's performan…
View article: Metal-Free, Bio-Triboelectric Nanogenerator Based on a Single Electrode of Bacterial Cellulose Modified with Carbon Black
Metal-Free, Bio-Triboelectric Nanogenerator Based on a Single Electrode of Bacterial Cellulose Modified with Carbon Black Open
Developing metal-free electrodes for prototypes of bio-based devices is an essential step in producing non-toxic components for implantable devices and wearables. In particular, the advancement in self-powered devices is a hot topic for se…
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: Correction: Carbon dots on LAPONITE® hybrid nanocomposites: solid-state emission and inter-aggregate energy transfer
Correction: Carbon dots on LAPONITE® hybrid nanocomposites: solid-state emission and inter-aggregate energy transfer Open
Correction for ‘Carbon dots on LAPONITE® hybrid nanocomposites: solid-state emission and inter-aggregate energy transfer’ by Bruno S. D. Onishi et al. , Nanoscale , 2024, https://doi.org/10.1039/d3nr06336d.
View article: Thermal, structural and optical properties of tungsten-fluorophosphate glasses and glass-ceramics with high lead fluoride contents
Thermal, structural and optical properties of tungsten-fluorophosphate glasses and glass-ceramics with high lead fluoride contents Open
Eu3+-doped lead fluorophosphate glass samples were prepared in the ternary system (40-x)NaPO3-xWO3-60PbF2 by the melt-quenching method. The influence of the NaPO3/WO3 ratio on the thermal and structural properties as well as on the ability…
View article: Extending the Palette of Luminescent Primary Thermometers: Yb<sup>3+</sup>/Pr<sup>3+</sup> Co-Doped Fluoride Phosphate Glasses
Extending the Palette of Luminescent Primary Thermometers: Yb<sup>3+</sup>/Pr<sup>3+</sup> Co-Doped Fluoride Phosphate Glasses Open
The unique tunable properties of glasses make them versatile materials for developing numerous state-of-the-art optical technologies. To design new optical glasses with tailored properties, an extensive understanding of the intricate corre…
View article: Review of Bacterial Nanocellulose as Suitable Substrate for Conformable and Flexible Organic Light-Emitting Diodes
Review of Bacterial Nanocellulose as Suitable Substrate for Conformable and Flexible Organic Light-Emitting Diodes Open
As the development of nanotechnology progresses, organic electronics have gained momentum in recent years, and the production and rapid development of electronic devices based on organic semiconductors, such as organic light-emitting diode…
View article: Thermal, Structural and Optical Properties of Tungsten-Fluorophosphate Glasses and Glassceramics with High Lead Fluoride Contents
Thermal, Structural and Optical Properties of Tungsten-Fluorophosphate Glasses and Glassceramics with High Lead Fluoride Contents Open
View article: Enhanced Photoredox Activity of BiVO4/Prussian Blue Nanocomposites for Efficient Pollutant Removal from Aqueous Media under Low-Cost LEDs Illumination
Enhanced Photoredox Activity of BiVO4/Prussian Blue Nanocomposites for Efficient Pollutant Removal from Aqueous Media under Low-Cost LEDs Illumination Open
Bismuth vanadate (BiVO4, BV) is a widely explored photocatalyst for photo(electro)chemical applications, but its full photocatalytic potential is hindered by the fast recombination and low mobility of photogenerated charge carriers. Herein…
View article: Synthesis of Organic Semiconductor Nanoparticles with Different Conformations Using the Nanoprecipitation Method
Synthesis of Organic Semiconductor Nanoparticles with Different Conformations Using the Nanoprecipitation Method Open
In recent years, nanoparticulate materials have aroused interest in the field of organic electronics due to their high versatility which increases the efficiency of devices. In this work, four different stable conformations based on the or…
View article: Highly red luminescent stabilized tetragonal rare earth-doped HfO2 crystalline ceramics prepared by sol-gel
Highly red luminescent stabilized tetragonal rare earth-doped HfO2 crystalline ceramics prepared by sol-gel Open
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. An ethanolic suspension containing 5-nm haf…
View article: (INVITED)Optical Materials for Flexible and Stretchable Random Lasers
(INVITED)Optical Materials for Flexible and Stretchable Random Lasers Open
The development of photonic devices has been largely benefitted by the offer of new flexible and stretchable materials. Many innovative components and devices have been developed for light-based applications. Presently it is recognized tha…
View article: A look into Phaffia rhodozyma biorefinery: From the recovery and fractionation of carotenoids, lipids and proteins to the sustainable manufacturing of biologically active bioplastics
A look into Phaffia rhodozyma biorefinery: From the recovery and fractionation of carotenoids, lipids and proteins to the sustainable manufacturing of biologically active bioplastics Open