A5017922828- Gold and Silver Nanoparticles Synthesis and Applications
- Conducting polymers and applications
- Analytical Chemistry and Sensors
- Electrochemical sensors and biosensors
- Lipid Membrane Structure and Behavior
- Electrochemical Analysis and Applications
- Molecular Junctions and Nanostructures
- Organic Electronics and Photovoltaics
- Advanced biosensing and bioanalysis techniques
- Advanced Sensor and Energy Harvesting Materials
- Polymer Surface Interaction Studies
- Biosensors and Analytical Detection
- Spectroscopy Techniques in Biomedical and Chemical Research
- Advanced Chemical Sensor Technologies
- Spectroscopy and Quantum Chemical Studies
- Nonlinear Optical Materials Studies
- Protein Interaction Studies and Fluorescence Analysis
- Porphyrin and Phthalocyanine Chemistry
- Quantum Dots Synthesis And Properties
- biodegradable polymer synthesis and properties
- Gas Sensing Nanomaterials and Sensors
- Luminescence and Fluorescent Materials
- Lignin and Wood Chemistry
- Polymer Nanocomposite Synthesis and Irradiation
- Heavy metals in environment
Universidade Estadual Paulista (Unesp)
2016-2025
Atkins (United Kingdom)
2013-2023
Hospital Regional de Presidente Prudente
2004-2021
Departamento de Ciência e Tecnologia
2003-2020
Oasis Charitable Trust
2020
Oxfam
2020
Universidade de São Paulo
1997-2017
Faculdade de Tecnologia e Ciências
2005-2015
Universidade Estadual de Campinas (UNICAMP)
1983-2012
Universidad de Valladolid
2010-2011
The present work demonstrates the microwave-assisted synthesis of two different structural morphologies containing nickel oxide nanoparticles (NiO NPs) embedded in nitrogen (N) and sulfur (S) co-doped reduced graphene (NS-rGO) nanosheets. synthesized NiO anchored on NS-rGO nanosheets (NS-rGO-NiO composites) covered by (NS-rGO:NiO were used as an application electromagnetic interference (EMI) shielding effectiveness (SE). EMI SE studies reveal that NS-rGO:NiO composites show improved...
To ensure compliance with regulatory standards, it is important to examine the potential of treatment technologies enhance trace metal removal from wastewater. This study investigated effectiveness coagulation–flocculation at removing metals humus effluent ferric chloride (FeCl3), synthetic polymer polyethyleneimine (PEI) and biopolymers chitosan floculan. Effluent samples were collected a trickling filter works operating in UK contained 21 ± 4 μg/L Cu, 0.8 0.1 Pb, 1 Ni 43 9 Zn. The...
The Langmuir-Blodgett (LB) technique has been used to obtain spatially resolved surface-enhanced resonance Raman scattering (SERRS) spectra of single dye molecules dispersed in the matrix a fatty acid. experimental results presented here mimic original electrochemical (SERS) work where background bulk water did not interfere with detection SERS signal adsorbed onto rough silver electrode. LB monolayers acid have fabricated on island films concentration, average, one probe molecule per...
Perylene tetracarboxylic derivatives (PTCDs) display exceptionally high two-photon absorption (2PA) cross- sections (δ, see Figure). In addition, the 2PA saturation behavior and strong two-photon-pumped fluorescence suggest that PTCD compounds may be attractive candidates for applications in optical limiting upconversion lasing.
Zika virus (ZIKV) was considered a public health emergency of international concern after the 2015 outbreak. Serological tests based on immunoassay platforms is one methods applied diagnosis ZIKV and Dengue (DENV). However, high limits detection (LOD) cross-reactivity between DENV are still limitations in immunological tests. In order to tackle these issues, we have designed an immune-specific assay surface-enhanced Raman scattering (SERS) nanoprobes. Gold shell-isolated nanoparticles...
The combination of two highly versatile materials as reduced graphene oxide (rGO) and molybdenum disulfide (MoS <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> ) forms the layered rGO-MoS hybrids that have great potential for sensing applications. In this paper, we developed a cost-effective, time-saving, efficient microwave-assisted method to exfoliate rGO MoS nanosheets in powder mixture formation hybrids. with organic inorganic 2-D...
Abstract The development of strategies to monitor the applications pesticides is primary importance. In present report, two aspects surface‐enhanced Raman scattering (SERS) effect fungicide thiram were investigated: quantitative analysis using standard addition method and adsorption mechanism onto Ag nanostructures theoretical approach. Experimentally, SERS intensity varies linearly from 1.0 × 10 −8 4.0 −7 mol/L with concentration leading a limit detection 1.2 for band at 560 cm −1 1.7 −9...
In this study, we introduce a simplified surface-enhanced Raman scattering (SERS) nanobiosensor for precise detection of SARS-CoV-2 antigen, leveraging supervised machine learning approaches. The biosensor was made with Au nanoislands conjugated 4-aminothiophenol reporter and an anti-SARS-CoV-2 antibody. Through the integration feature selection algorithms, namely, logistic regression, linear discriminant analysis, support vector machine, achieved high accuracies ranging from 96 to 100% in...
The phase transition from the non-polar α-phase to polar β-phase of poly(vinylidene fluoride) (PVDF) has been investigated using micro-Raman spectroscopy, which is advantageous because it a nondestructive technique. Films α-PVDF were subjected stretching under controlled rates at 80 °C, while β-PVDF was monitored by decrease in Raman band 794 cm −1 characteristic α-phase, along with concomitant increase 839 β-phase. α→β our PVDF samples could be achieved even for sample stretched twice...
Molecular-level interactions are found to bind iron tetrasulfonated phthalocyanine (FeTsPc) and the polyelectrolyte poly(allylamine hydrochloride) (PAH) in electroactive layer-by-layer (LBL) films. These have been identified by comparing Fourier transform infrared (FTIR) Raman spectroscopy data from bulk samples of FeTsPc PAH with those FeTsPc/PAH LBL Of particular importance were SO3- -NH3 that we believe between unprotonated amine groups coordinating metal phthalocyanine. The multilayer...
The synthesis, film-packing properties in Langmuir and Langmuir−Blodgett (LB) films, surface-enhanced fluorescence (SEF) of a new family perylene tetracarboxylic derivatives (PTCD) are reported. molecular organization on water subphase is extracted from surface pressure−area (π−A) isotherms recorded under varying compression speeds temperatures. It was found that the π−A temperature dependent area per molecule decreases with increasing subphase. effect more pronounced for molecules longer...
Four lignin samples were extracted from sugar cane bagasse using four different alcohols (methanol, ethanol, n-propanol, and 1-butanol) via the organosolv-CO2 supercritical pulping process. Langmuir films characterized by surface pressure vs mean molecular area (Π−A) isotherms to exploit information at level carrying out stability tests, cycles of compression/expansion (hysteresis), subphase temperature variations, metallic ions dissolved into water concentrations. Briefly, it was observed...
Abstract The inelastic scattering of light, Raman scattering, presents a very low cross section. However, the signal can be amplified by several orders magnitude, leading to so-called surface-enhanced (SERS) phenomenon. Basically, SERS effect is achieved when target molecule (analyte) adsorbed onto metallic nanoparticles, usually noble metals. This article an overview applications cancer diagnosis and detection pesticides, explosives, drugs (illicit pharmacological). routinely applied...
Carbendazim (MBC) is a fungicide widely used in agriculture, and there are serious concerns regarding the health risks that could be caused by this fungicide. Here, we explore its ultrasensitive detection surface‐enhanced Raman scattering (SERS). First, to obtain maximum SERS signal, adsorption of target molecule onto metallic surface essential. Therefore, study MBC nanoparticle under different experimental conditions, such as synthesis methods nanoparticle, variable excitation wavelength,...
Incorporation into cell membranes is key for the action of photosensitizers in photomedicine treatments, with hydroperoxidation as prominent pathway lipid oxidation. In this paper, we use Langmuir monolayers 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) and 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) membrane models to investigate adsorption photosensitizer erythrosin its effect on photoinduced From surface pressure isotherms polarization-modulated infrared reflection–absorption...