A5045296115- Advanced biosensing and bioanalysis techniques
- Gold and Silver Nanoparticles Synthesis and Applications
- Plasmonic and Surface Plasmon Research
- Supramolecular Self-Assembly in Materials
- Copper-based nanomaterials and applications
- Quantum Dots Synthesis And Properties
- Nanocluster Synthesis and Applications
- Biosensors and Analytical Detection
- Molecular Junctions and Nanostructures
- Conducting polymers and applications
- RNA Interference and Gene Delivery
- Polydiacetylene-based materials and applications
- Nanofabrication and Lithography Techniques
- Electrochemical sensors and biosensors
- Perovskite Materials and Applications
- Chalcogenide Semiconductor Thin Films
- DNA and Nucleic Acid Chemistry
- Anodic Oxide Films and Nanostructures
- Antimicrobial agents and applications
- Surface Modification and Superhydrophobicity
- Thermodynamic properties of mixtures
- Transgenic Plants and Applications
- Polymer Surface Interaction Studies
- Organic Light-Emitting Diodes Research
- Click Chemistry and Applications
Universidade Estadual de Campinas (UNICAMP)
2018-2025
University of Potsdam
2020-2025
Czech Academy of Sciences, Institute of Analytical Chemistry
2025
Universidade Federal do ABC
2012-2017
Centro Regional de Derechos Humanos y Justicia de Género, Corporación Humanas
2015-2016
Centro Universitário Fundação Santo André
2015-2016
Perovskite solar cells are among the most exciting photovoltaic systems as they combine low recombination losses, ease of fabrication, and high spectral tunability. The Achilles heel this technology is device stability due to ionic nature perovskite crystal, rendering it highly hygroscopic, extensive diffusion ions especially at increased temperatures. Herein, we demonstrate application a simple solution-processed perfluorinated self-assembled monolayer (p-SAM) that not only enhances cell...
Abstract Meeting the current needs for easier, more precise and faster analyses that also follow principles of green analytical chemistry requires novel strategies. Since appearance in this century first device based on a paper platform, many studies have been presented literature, providing wide range designs possibilities application platforms to electroanalytical systems. This Review gives an overview field can pave way future development electrochemical paper‐based devices. We present...
In this work, a new hypothesis for the electrocatalytic behavior of CuO electrodes is presented. Different from established mechanism, here we discuss why CuIII species do not participate in oxidation mechanism carbohydrates. We show that hydroxyl ion adsorption and semiconductive properties material play more significant role process. The relationship between flat band potential begin suggests concentration vacancies charge region acts upon reactivity adsorbed ions through partial transfer...
The detection of a single-enzyme catalytic reaction by surfaced-enhanced Raman scattering (SERS) is presented utilizing DNA origami-based plasmonic antennas. A single horseradish peroxidase (HRP) was accommodated on origami nanofork antenna (DONA) containing gold nanoparticles, enabling the tracing single-molecule SERS signals during peroxide reduction reaction. This allows monitoring structure enzymatic center and products under suitable liquid conditions. Herein, we demonstrate chemical...
A versatile generation of plasmonic nanoparticle dimers for surface-enhanced Raman scattering (SERS) is presented by combining a DNA origami nanofork and spherical nonspherical Au or Ag nanoparticles. Combining different species with to form nanoantennas (DONAs), the can be optimized specific excitation wavelength in SERS. The preparation such robust enough enable characterization SERS intensities enhancement factors dye-modified DONAs on single dimer level measuring total several thousands...
Peptide-based scaffolds are a frontier research area in materials science with widespread impact biomedical engineering. In this paper, we describe hybrid material formulated through the conjugation of electrospun polycaprolactone (PCL) fibers and micro/nanotubes l,l-diphenylalanine (FF-MNTs). Morphology crystallinity composite matrices investigated using wide range analytical techniques including electron microscopy, thermal analyses, X-ray diffraction micro-tomography. Peptide assemblies...
Plasmon-driven photocatalysis is an emerging and promising application of noble metal nanoparticles (NPs). An understanding the fundamental aspects plasmon interaction with molecules factors controlling their reaction rate in a heterogeneous system high importance. Therefore, dehalogenation kinetics 8-bromoguanine (BrGua) 8-bromoadenine (BrAde) on aggregated surfaces silver (Ag) gold (Au) NPs have been studied to understand underlying mechanism prevalent systems induced by plasmons monitored...
Antimicrobial resistance (AMR) is a severe threat to modern health care and must be addressed prevent millions of deaths in the coming decades. polymers (APs) do not provoke resistances are promising alternatives conventional antibiotics. Classic APs possess an amphiphilic structure (cationic hydrophobic). Herein we question necessity amphiphilicity find that hydrophobicity essential quality these polymers. Combining cationic monomers with hydrophilic subunits containing hydrogen bond donors...
A novel enzymatic platform for the sensing of H2O2 and glucose that uses L,L-diphenylalanine micro/nanostructures (FF-MNSs) as an enzyme support is shown. This obtained by self-assembly poly(allylamine hydrochloride) (PAH), FF-MNSs, microperoxidase-11 (MP11) anchored onto peptide matrix, in two different crystal structures FF-MNSs: hexagonal (P61) orthorhombic (P22121). The electroactive area electrodes increases presence FF-MNSs. We also demonstrate via theoretical calculations valence band...
Using hot charge carriers far from a plasmonic nanoparticle surface is very attractive for many applications in catalysis and nanomedicine will lead to better understanding of plasmon-induced processes, such as hot-charge-carrier- or heat-driven chemical reactions. Herein we show that DNA able transfer electrons generated by silver over several nanometers drive reaction molecule nonadsorbed on the surface. For this use 8-bromo-adenosine introduced different positions within double-stranded...
We report for the first time on self-assembly of nanostructures composed exclusively alternating positively charged and hydrophobic amino acids. A novel arginine/phenylalanine octapeptide, RF8, was synthesized. Because low hydrophobicity this sequence makes its spontaneous ordering through solution-based methods difficult, a recently proposed solid–vapor approach used to obtain nanometric architectures ITO/PET substrates. The formation investigated under different preparation conditions,...
Broadband light absorbers are very attractive for many applications, including solar energy conversion, photothermal therapy, and plasmonic nanocatalysis. Black gold nanoparticles an excellent example of broadband in the visible near-infrared (NIR)ranges; however, their synthesis typically requires multistep deposition or high temperatures. Herein, we report black via a facile, one-step green method using commonly known precursors (chloroauric acid sodium citrate) performed at room...
Light induced electron transfer reactions of molecules on the surface noble metal nanoparticles (NPs) depend significantly electronic properties metal-organic interface. Hybridized metal-molecule states and dipoles at interface alter work function facilitate or hinder between NPs ligand. X-ray photoelectron spectroscopy (XPS) measurements isolated AuNPs coated with thiolated ligands in a vacuum have been performed as photon energy, depth dependent information has obtained. The role XPS...
Abstract Antimicrobial polymers are a promising alternative to conventional antibiotics in the fight against antimicrobial resistance. Cationic bottle brush copolymers have shown be superior linear topologies previous studies. Herein, aspect ratio of such is varied creating differently shaped confined unimolecular structures with varying degrees side chain mobility. Using reversible addition‐fragmentation chain‐transfer (RAFT) polymerization, brushes produced one‐pot procedure. The...
Hydrogels based on peptide nanostructures are biological entities that can be applied in a wide range of applications, such as scaffolds for tissue engineering, drug delivery, and biosensors.The aim this research was to study hydrogels N-(9-fluorenylmethoxycarbonyl)-L,L-diphenylalanine (Fmoc-FF) two different media: water phosphate buffer.These were used encapsulating Leishmania infantun chagasi soluble proteins.The structure the matrices investigated detail through scanning transmission...
Organic molecule conjugates usually arrange themselves into complex multiphase systems that are sensitive to processing and local chemical environment. Moreover, these able self-assemble at different scales, varying from nano- macroscale. In addition, intermolecular interactions introduce structural variations in the molecular packing large-scale ordering, which directly affects physicochemical properties of materials. Herein, we study synthesis polymer blends based on poly(ε)-caprolactone...
Abstract The plasmon‐driven dimerization of 4‐nitrothiophenol (4NTP) to 4‐4′‐dimercaptoazobenzene (DMAB) is a testbed for understanding bimolecular photoreactions enhanced by nanoscale metals, in particular, regarding the relevance electron transfer and heat from metal molecule. By adding methylene group between thiol bond nitrophenyl, structural flexibility added reactant Time‐resolved surface‐enhanced Raman‐spectroscopy proves that this (4‐nitrobenzyl)mercaptan (4NBM) molecule has larger...
We present a PDMS-based stamp featuring xanthates within its framework, to graft polymer brushes from surface. The demonstrates high efficacy of polymer-supported μCP, but does not show leakage oligomeric PDMS, which represents common source contamination in soft lithography.
Surface-enhanced Raman scattering is a powerful approach to detect molecules at very low concentrations, even up the single-molecule level. One important aspect of materials used in such technique how much signal intensified, quantified by enhancement factor (EF). Herein we obtained EFs for gold nanoparticle dimers 60 and 80 nm diameter, respectively, self-assembled using DNA origami nanotriangles. Cy5 TAMRA were as surface-enhanced (SERS) probes, which enable observation individual...
Enhancing Raman signatures of molecules by self-assembled metal nanoparticles, nanolithography patterning, or designing plasmonic nanostructures is widely used for detection low abundance biological systems. Self-assembled peptide provide a natural template tethering Au and Ag nanoparticles due to its fractal surface. Here, we show the use L,L-diphenylalanine micro-nanostructures (FF-MNSs) organization (Nps) potential as surface-enhanced scattering (SERS)-active substrates. The FF-MNSs...