A5011688410- Conducting polymers and applications
- Advanced Chemical Sensor Technologies
- Organic Electronics and Photovoltaics
- Analytical Chemistry and Sensors
- Organic Light-Emitting Diodes Research
- Gas Sensing Nanomaterials and Sensors
- Particle accelerators and beam dynamics
- Magnetic confinement fusion research
- Superconducting Materials and Applications
- Plasma Diagnostics and Applications
- Analytical chemistry methods development
- Particle Accelerators and Free-Electron Lasers
- Synthesis and properties of polymers
- Analytical Chemistry and Chromatography
- Electrochemical sensors and biosensors
- Organic Chemistry Cycloaddition Reactions
- Synthesis and Reactivity of Sulfur-Containing Compounds
- Asymmetric Synthesis and Catalysis
- Molecular Junctions and Nanostructures
- Sulfur-Based Synthesis Techniques
- Synthetic Organic Chemistry Methods
- Plasma Applications and Diagnostics
- Inorganic and Organometallic Chemistry
- Particle Detector Development and Performance
- Synthesis and Catalytic Reactions
Universidade de São Paulo
2016-2025
Companhia Energética de São Paulo
2019
Universidade Politecnica
2017
Instituto Butantan
2015
Instituto de Tecnología Química
2008
Universidade Cidade de São Paulo
2006
European Organization for Nuclear Research
1997-2002
Universidade Federal do Paraná
2002
Max Planck Institute for Plasma Physics
1973-1993
Max Planck Innovation
1985-1993
As consumption of fish and fish-based foods increases, non-destructive monitoring freshness also becomes more prominent. Fish products are very perishable prone to microbiological growth, not always easily detected by organoleptic evaluation. The analysis the headspace specimens through gas sensing is an interesting approach monitor freshness. Here we report a method for Tilapia spoilage based on application single sensitive gel material coupled optical electronic nose. signals sensor extent...
Photo-induced copper-mediated polymerization (photoCMP) is employed for the synthesis of multiarm-multiblock star copolymers. Based on a core-first approach, polymers with four, six and twenty-one arms have been synthesized.
On-line microreactor/ESI-MS experiments and kinetic simulations on single unit monomer insertions are combined to assess the efficiency of SUMI process.
The cooperative assembly of biopolymers and small molecules can yield functional materials with precisely tunable properties. Here, the fabrication, characterization, use multicomponent hybrid gels as selective gas sensors are reported. composed liquid crystal droplets self‐assembled in presence ionic liquids, which further coassemble to form stable matrices. Each individual component be varied acts cooperatively tune gels' structure function. unique molecular environment is explored for...
Molecularly Imprinted Polymers (MIPs) were synthesised for the selective detection of amoxicillin in aqueous samples. Different functional monomers tested to determine optimal composition via batch rebinding experiments. Two different sensor platforms using same MIP solution; one being bulk synthesized and surface modified Screen Printed Electrodes (SPEs) drop casting microparticles onto electrode other UV polymerized directly SPE form a thin film. The sensors used measure conjunction with...
A low-cost chemiresistive gas sensor is described, made by the deposition of a thin film conductive polymer, poly(2-dodecanoylsulfanyl-p-phenylenevinylene), doped with dodecylbenzenesulfonic acid (10%, w/w), onto interdigitated electrodes. The exhibits linear electrical conductance changes in function concentration methanol present sugar-cane spirit range between 0.05% and 4.0%. Since cheap, easy to fabricate, durable, presents low power consumption, not sensitive ethanol, acetic or water,...
The phase transitions of binary lipid mixtures are studied by a combination Peltier-element-based adiabatic scanning calorimetry (pASC) and quartz crystal microbalance with dissipation monitoring (QCM-D). pASC, novel type calorimeter, provides valuable unambiguous information on the heat capacity enthalpy, whereas QCM-D is proposed as genuine way determining diagrams analysing temperature dependence viscosity. Two phospholipids same polar head differing in alkyl chain length, DMPC + DPPC...
Three tobacco types (Burley, Flue Cured, and Oriental) eight cigarette brands were unequivocally identified using an electronic nose formed by only three sensors based on a single novel conducting polymer (PF-BTB) doped with different porphyrins (H2TPP, H2TPFP, H2BTBOP). The synthesis characterization of the are also discussed. Small changes in porphyrin structure caused significant electrical conductance response patterns upon exposure to complex chemical matrixes, representing approach for...
This work demonstrates the application of an electronic nose (e-nose) for discrimination between authentic and adulterated honey. The developed e-nose is based on electrodes covered with ionogel (ionic liquid + gelatin Fe3O4 nanoparticle) films. Authentic honey samples were submitted to analysis, capacity sensors was evaluated using principal component analysis (PCA) average relative response data. From PCA biplot, it possible note two well-defined clusters no intersection observed. To...
An innovative polymer-based dual detection microfluidic platform has been developed for the accurate and reliable sensing of trace amounts antibiotic tetracycline in environmental food samples. This was achieved through production a bespoke polymeric material formed via an imprinting technique using fluorescent dye. Thus, this enables tetracycline, both thermally, analyzing heat-transfer resistance at solid-liquid interface, optically, inner filter effect. The combination these two methods...
A novel, low-cost, sensitive microwave microfluidic glucose detecting biosensor incorporating molecularly imprinted polymer (MIP) is presented. The sensing device based on a stub resonator to characterize water solutions. tip of one the stubs coated with MIP increase selectivity sensor and hence sensitivity compared uncoated or non-imprinted (NIP) sensor. was fabricated FR4 substrate for low-cost purposes. In presence MIP, loaded solution ranging from 50 mg/dL 400 observed experience an...
Although ionic liquids (ILs) are promising materials for electrochemical gas sensors, their practical application is somehow limited since it difficult to confine a liquid in micro-devices. The gelation of ILs induced by biopolymer such as gelatin originates quasi-solid named Ion Jelly which dimensionally stable and fairly conductive. In this paper we describe chemoresistive sensors having different ion jellies an active layer electronic nose formed array sensors. performance e-nose was...
Nanoparticles have been increasingly studied due to their unique properties. The deposition of uniform layers with these nanoparticles however is a crucial step in many applications. In this work, ultrasonic spray coating the technique choice as it by design well‐suited for nano‐suspension dispersions. influence different parameters, ink composition and post‐treatment are subject study paper. It shown work that (mass‐) production nanoparticle possible narrow distribution droplet size...
A convenient method to synthesize core cross-linked star polymers <italic>via</italic> a continuous flow photopolymerization process is developed.
In this contribution, molecularly imprinted polymers (MIPs) were electropolymerised onto screen-printed carbon electrodes (SPCEs) to develop specific sensors for thermal detection of yeast. A laboratory yeast strain free interferents was used optimise the polymerisation procedure, whereas in a complex mixture (yeast baking) employed produce final and demonstrate proof-of-application. Two different electropolymerisation methods employed, cyclic voltammetry chronoamperometry respectively;...