A5040636694- Gold and Silver Nanoparticles Synthesis and Applications
- Electrochemical Analysis and Applications
- Electrochemical sensors and biosensors
- Advanced biosensing and bioanalysis techniques
- Molecular Junctions and Nanostructures
- Pesticide and Herbicide Environmental Studies
- Biosensors and Analytical Detection
- Spectroscopy Techniques in Biomedical and Chemical Research
- Porphyrin and Phthalocyanine Chemistry
- Insect and Pesticide Research
- Pesticide Residue Analysis and Safety
- Analytical Chemistry and Sensors
- Lipid Membrane Structure and Behavior
- Advanced Nanomaterials in Catalysis
- Nanocluster Synthesis and Applications
- Conducting polymers and applications
- Body Composition Measurement Techniques
- Quantum Dots Synthesis And Properties
- Cancer, Lipids, and Metabolism
- Paraquat toxicity studies and treatments
- Pharmaceutical and Antibiotic Environmental Impacts
- Muscle metabolism and nutrition
- Pesticide Exposure and Toxicity
- Protein Interaction Studies and Fluorescence Analysis
- Advanced Cellulose Research Studies
Universidade Estadual Paulista (Unesp)
2015-2025
Hospital Regional de Presidente Prudente
2019-2021
Surface-enhanced Raman scattering (SERS) is highly dependent on the adsorption of target molecules onto metallic surfaces, such as colloidal nanoparticles. The selection suitable substrates crucial for optimizing SERS performance. Herein, we investigated dependence two pesticide signals, thiabendazole (TBZ) and carbendazim (MBC), both Ag nanoparticles (reduced by hydroxylamine—AgH or citrate—AgCT) aggregation conditions induced adding different salts (NaCl, KCl KNO3). In addition to...
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...
Detection of the drug Levodopa (3,4-dihydroxyphenylalanine, L-Dopa) is essential for medical treatment several neural disorders, including Parkinson’s disease. In this paper, we employed surface-enhanced Raman scattering (SERS) with three shapes silver nanoparticles (nanostars, AgNS; nanospheres, AgNP; and nanoplates, AgNPL) to detect L-Dopa in nanoparticle dispersions. The sensitivity SERS signal depended on both shape concentration. adsorption mechanisms inferred from a detailed analysis...
Experimental efforts aimed at detecting levodopa (l-DOPA) using surface-enhanced Raman scattering (SERS) face a persistent challenge in obtaining SERS signal with negatively charged nanoparticles. This stems from the repulsion between deprotonated l-DOPA aqueous solution and surface of nanoparticles, revealing dependencies on time concentration to achieve signal. study explores adsorption mechanism gold nanorods (AuNRs) covered cetrimonium bromide (CTAB) bilayer as colloidal solution,...
ABSTRACT The new compound (1S,4S)‐ N ‐(4‐iodophenyl)bicyclo[2.2.1]hept‐5‐en‐2‐carboxamide ( NBE–amide‐I ) was synthesized using 4‐iodoaniline and 5‐norbornene‐2‐carboxylic acid. then used in an oxidative addition reaction with [Ni(PPh 3 4 ] to obtain the complex [NiI(NBE–amide)(PPh 2 Ni–NBE ). complexes [Ni(NBE–amide)(PPh )(Schiff–cyclohexane)] (mono‐Schiff–Ni) [{RuCl (η 6 ‐ p ‐cymene)}μ{(Schiff‐pip)Ni(aryl–NBE)(PPh )}] Ru–Ni–NBE were via a one‐pot Ni–NBE, salicylaldehyde,...
The wide use of pesticides in agriculture makes necessary the development cost-effective, easy, and rapid methods aiming for environmental health protection. We propose fabrication investigation layer-by-layer (LbL) films composed reduced graphene oxide stabilized polyelectrolytes presence absence gold nanoparticles (AuNPs) toward methyl parathion (MP) detection. In addition to film assembly sensing application, we performed a systematic influence MP distribution on limit detection linear...
Growing food demand has been addressed by protecting crops from insects, weeds, and other organisms increasing the application of pesticides, thus risk environmental contamination. Many such as triazines, are poorly soluble in water require trace detection methods, which normally achieved with high-cost sophisticated chromatography techniques. Here, we combine surface-enhanced Raman scattering (SERS) multidimensional projection techniques to detect toxic herbicide prometryn ultrapure,...
The recent development of silver nanostars (Ag-NSs) is promising for improved surface-enhanced sensing and spectroscopy, which may be further exploited if the mechanisms behind excitation localized surface plasmon resonances (LSPRs) are identified. Here, we show that LSPRs in Ag-NSs can obtained with finite-difference time-domain (FDTD) calculations by considering as combination crossed nanorods (Ag-NRs). In particular, demonstrate an apparent tail at large wavelengths ( λ ≳ 700 nm) observed...
The variability in response to conventional prostate cancer (PC) therapies, coupled with the emergent issue of drug resistance, underscores critical need for innovative treatment strategies. Aerobic physical exercise reduced incidence several cancers, but mechanism underlying these effects associated nanoemulsion not fully understood. application a lipid (LDE) delivery system docetaxel (DTX), showing marked enhancement therapeutic efficacy when combined aerobic exercise. This novel...
The level of aggregation and aggregate morphology metallic nanoparticles are factors that influence the SERS signal (surface-enhanced Raman scattering), affecting reproducibility sensitivity. This study presents a systematic evaluation colloidal on by combining transmission electron microscopy UV-vis extinction spectroscopy. It focuses effect two methods sample preparation ("external standard method-ESM" "standard addition method-SAM") using fungicide thiabendazole (TBZ) in Ag colloid as...
Abstract In this work, we explore the use of surface‐enhanced Raman scattering (SERS) on silver (Ag) nanoparticles for detection triazine pesticide atrazine and prometryn as well their degradation products. This tecnique was used to monitor both in commercial samples by effects heat humidity. We have studied adsorption affinity these pesticides products employed SERS substrates order check optimal conditions original The presence with high solubility water is great interest human health, but...