A5031514011- Electrochemical sensors and biosensors
- Electrochemical Analysis and Applications
- Analytical Chemistry and Sensors
- Advanced biosensing and bioanalysis techniques
- Conducting polymers and applications
- Antibiotics Pharmacokinetics and Efficacy
- Advanced Photocatalysis Techniques
- Carbon Nanotubes in Composites
- Biosensors and Analytical Detection
- Advanced Chemical Sensor Technologies
- Gas Sensing Nanomaterials and Sensors
- Analytical Methods in Pharmaceuticals
- Catalytic Processes in Materials Science
- Nanomaterials for catalytic reactions
- Carbon and Quantum Dots Applications
- Molecular Junctions and Nanostructures
- Analytical Chemistry and Chromatography
- Pharmacological Effects and Assays
- Water Quality Monitoring and Analysis
- Pharmaceutical and Antibiotic Environmental Impacts
- Effects and risks of endocrine disrupting chemicals
- Advanced oxidation water treatment
- Microbial Metabolic Engineering and Bioproduction
- Nanoparticles: synthesis and applications
- Biotin and Related Studies
Universidade Federal de São Carlos
2015-2024
Division of Chemistry
2018
Universidade de São Paulo
2011-2014
A sensitive electrochemical acetylcholinesterase (AChE) biosensor was successfully developed on polyaniline (PANI) and multi-walled carbon nanotubes (MWCNTs) core–shell modified glassy electrode (GC), used to detect carbamate pesticides in fruit vegetables (apple, broccoli cabbage). The pesticide biosensors were applied the detection of carbaryl methomyl food samples using chronoamperometry (CA). GC/MWCNT/PANI/AChE exhibited limits 1.4 0.95 μmol L−1, respectively, for methomyl. These below...
A disposable microfluidic electrochemical paper-based device for multiplexed analysis based on sixteen independent channels with detection is proposed. major advantage of this work was the non-necessary use a wax printer devices manufacturing which has high cost operation. In addition, commercial multiplexing module used that capability 8-16 and, first time using module, strategy both working and reference electrodes were used. These respective sensors can be operated employing one or...
Abstract This work describes the development, electrochemical characterization and utilization of a cobalt phthalocyanine modified carbon nanotube electrode for quantitative determination dopamine in 0.2 mol L −1 phosphate buffer contaminated with high concentration ascorbic acid. The surface was analyzed by cyclic voltammetry impedance spectroscopy which showed presenting charge transfer resistance 500 Ω, against 16.46 kΩ value found bare glassy surface. A pseudo rate constant 5.4×10 −4 cm...
Abstract A copper phthalocyanine/multiwalled carbon nanotube film‐modified glassy electrode has been used for the determination of herbicide glyphosate (Gly) at −50 mV vs. SCE by electrochemical oxidation using differential pulse voltammetry (DPV). Cyclic and impedance spectroscopy showed that Gly is adsorbed on metallic centre phthalocyanine molecule, with formation Gly‐copper ion complexes. An analytical method was developed DPV in pH 7.4 phosphate buffer solution, without any pretreatment...
A low-cost and disposable microcell was constructed with a screen-printed electrode for the non-enzymatic electrochemical determination of creatinine. The working modified carbon black maintained in contact paper-adsorbed iron (III) ions. small sample volume 3 μL required device operation. Then, ions were complexed presence creatinine chemical step, followed by an reduction non-complexed metallic excess. Cyclic voltammetry differential-pulse experiments employed characterizations analytical...
Abstract A disposable electrochemical paper‐based analytical device was constructed based on use of sequential analysis with multiplexed working electrodes and applied for the determination glucose, creatinine, uric acid. The 16 microfluidic channels, arranged in four set components surrounding sample injection hole. In addition, a commercial multiplexing module used, which allowed electrodes. This design radial homogeneous elution to each sensing spot high throughput analysis....
Abstract The electrochemical detection of the hazardous pollutant 4‐nitrophenol (4‐NP) at low potentials, in order to avoid matrix interferences, is an important research challenge. This study describes development, characterization and utilization a multiwall carbon nanotube (MWCNT) film electrode for quantitative determination 4‐NP natural water. Electrochemical impedance spectroscopy measurements showed that modified surface exhibits decrease ca. 13 times charge transfer resistance when...
Lipase B from Candida antarctica (CAL-B) is largely employed as a biocatalyst for hydrolysis, esterification, and transesterification reactions. CAL-B good model enzyme to study factors affecting the enzymatic structure, activity and/or stability after an immobilization process. In this study, we analyzed of on different magnetic nanoparticles, synthesized by coprecipitation method inside inverse micelles made zwitterionic surfactants, with distinct carbon chain length: 4 (ImS4), 10 (ImS10)...
Abstract A sensitive way to determine levofloxacin using a sensor based on vertical aligned carbon nanotubes is described. The morphology and the electrochemical performance of electrodes were characterised by atomic force microscopy, cyclic voltammetry square wave voltammetry. scan‐rate study impedance spectroscopy showed that oxidation product adsorbed electrode surface. Differential pulse in phosphate‐buffer solution allowed development method levels range 1.0–10.0 µmol L −1 , with...
Abstract The composite material of reduced graphene and Ru nanoparticles (rGO/RuNP) was obtained by electrochemical oxidation ruthenium immobilised on the glassy carbon electrode (GCE) surface used for simultaneous electroanalysis drugs. There are many discussions in scientific community about decrease therapeutic efficacy contraceptives when associated with antibiotics. antibiotic effect antagonist can increase contraceptive excretion levels urine, indicating a reduction body thus desired...