A5013915810- Electrochemical sensors and biosensors
- Electrochemical Analysis and Applications
- Analytical Chemistry and Sensors
- Advanced biosensing and bioanalysis techniques
- Natural Fiber Reinforced Composites
- Conducting polymers and applications
- Advanced Cellulose Research Studies
- Biofuel production and bioconversion
- biodegradable polymer synthesis and properties
- Mesoporous Materials and Catalysis
- Pharmacological Effects and Assays
- Microplastics and Plastic Pollution
- Nanocomposite Films for Food Packaging
- Biosensors and Analytical Detection
- Additive Manufacturing and 3D Printing Technologies
- Lignin and Wood Chemistry
- SARS-CoV-2 detection and testing
- Agricultural and Food Sciences
- Medicinal Plants and Neuroprotection
- Photopolymerization techniques and applications
- Advanced Chemical Sensor Technologies
- Water Quality Monitoring and Analysis
- Mechanical Behavior of Composites
- Synthesis and properties of polymers
- Silicone and Siloxane Chemistry
Universidade Estadual Paulista (Unesp)
2015-2024
Universidade de São Paulo
2007-2015
Instituto de Psicologia Comportamental de São Carlos
2007-2014
Fiat Chrysler Automobiles (Germany)
2014
Universidade Federal de São Carlos
2012-2014
University of Coimbra
2010
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 novel electrochemical sensor based on a glassy carbon electrode, modified with reduced graphene oxide and copper nanoparticles (GC/rGO-CuNPs), was developed for the determination of glyphosate herbicide (GLY) by differential pulse voltammetry (DPV). The proposed material synthesised chemical method characterised scanning electron microscopy (SEM) cyclic (CV). Voltammetric tests showed that anodic peak at 30 mV, due to Cu0 Cu2+ oxidation process, decreased linearly small additions GLY; this...
Abstract A new sensor has been developed for the simultaneous detection of cadmium, lead, copper and mercury, using differential pulse square wave anodic stripping voltammetry (DPASV SWASV) at a graphite–polyurethane composite electrode with SBA‐15 silica organofunctionalized 2‐benzothiazolethiol as bulk modifier. The heavy metal ions were preconcentrated on surface modified −1.1 V vs. SCE where they complex are reduced to metals, then reoxidized. Optimum SWASV conditions lead nanomolar...
Due to the SARS-CoV-2 pandemic, there has been an increase in search for affordable healthcare devices mass testing and rapid diagnosis. In this context, work described a new methodology detection based on impedimetric immunosensor developed using advantageous immobilization of antibodies reduced graphene oxide (rGO). The rGO was obtained by chemical synthesis from commercial (GO), materials were morphologically, electrochemically visually characterized. cyclic voltammetry (CV)...
This paper describes for the first time surface modification of glassy carbon (GC) electrodes with bamboo-based renewable (RC) and antimony nanoparticles (SbNPs) determination methylparaben (MePa) in personal care products (PCPs). The synthesized RC-SbNP material was successfully characterized by scanning electron microcopy, energy-dispersive X-ray spectroscopy cyclic voltammetry. proposed sensor applied detection MePa using optimized parameters differential pulse voltammetry (DPV)....
This study describes the use of copper nanoparticles (CuNPs) and reduced graphene oxide (rGO) as an electrode modifier for determination chloroquine phosphate (CQP). The synthetized rGO-CuNPs composite was morphologically characterized using scanning electron microscopy electrochemically cyclic voltammetry. parameters were optimized developed electrochemical sensor applied in CQP square-wave voltammetry (SWV). analytical range 0.5 to 110 μmol L-1 (one highest linear ranges considering...
Abstract Bismuth films (BiF) deposited in situ on graphite‐polyurethane composite electrodes were successfully used for the determination of Zn, Cd, Pb, Cu and Hg, simultaneously acetate buffer solution pH 4.5 using square wave anodic stripping voltammetry. It is possible to determine metals reoxidized at potentials more negative positive than Bi BiF; reoxidation was studied by electrochemical impedance spectroscopy. The BiF‐modified electrode applied analyse tap water. influence...
Abstract A core‐shell structure based on polyaniline (PANI) and multiwalled carbon nanotubes (MWCNT) films was electrodeposited glassy (GC) for the immobilization of acetylcholinesterase (AChE) as enzyme, in developing a biosensor pesticides. The characterization advantages using hybrid materials were examined by Fourier transform infrared spectroscopy (FTIR), field‐emission gun scanning electron microscopy (FEG‐SEM), cyclic voltammetry (CV) electrochemical impedance (EIS). AChE surface...
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 An electrochemical device was developed for the simultaneous determination of sulfamethoxazole (SMX) and trimethoprim (TMP) using differential pulse voltammetry glassy carbon (GC) electrodes modified with reduced graphene oxide (rGO) silver nanoparticle (AgNP) composites, synthesised both chemical methods. The morphology behaviour GC rGO/AgNP (chemical method) rGO‐AgNP (electrochemical composites were characterised by scanning electron microscopy cyclic voltammetry. These techniques...
Abstract This work presents, for the first time, oxidation mechanism of levofloxacin combining electrochemical experiments and molecular modelling techniques. Levofloxacin is one most widely used antibiotics in world. The detection this antibiotic important, because it cannot be fully assimilated by human organism, therefore considerate a hazardous pollutant environment. Sensors based on reduced graphene oxide (rGO) modified with antimony copper nanoparticles (NPs) were synthesized,...
Enzymatic electrochemical biosensors play an important role in the agri-food sector due to need develop sustainable, low-cost, and easy-to-use analytical devices. Such can be used monitor pathogens, endocrine disruptors, pesticides, such as carbaryl, widely many crops. The use of renewable carbon (RC) sources, provided from biomass pyrolysis has been often applied fabrication sensors. This material is a great candidate for biosensor presence surface functional groups, porosity, moderate...
The global prevalence of counterfeit and low-quality pharmaceuticals poses significant health risks challenges in medical treatments, creating a need for rapid reliable drug screening technologies. This study introduces cost-effective electrochemical paper-based device (ePAD) modified with functionalized bamboo-derived biochar (BCF) the detection paracetamol substandard medicines. sensor was fabricated using custom 3D-printed stencil PLA, designed efficient production, 60:40 (m/m) graphite...