A5091672583- Gold and Silver Nanoparticles Synthesis and Applications
- Molecular Sensors and Ion Detection
- Nanoparticles: synthesis and applications
- Nanocluster Synthesis and Applications
- Advanced Nanomaterials in Catalysis
- Luminescence and Fluorescent Materials
- Nanomaterials for catalytic reactions
- Advanced biosensing and bioanalysis techniques
- Quantum Dots Synthesis And Properties
- Analytical Chemistry and Sensors
- Electrochemical sensors and biosensors
- Nanoparticle-Based Drug Delivery
- Laser-Ablation Synthesis of Nanoparticles
- Graphene and Nanomaterials Applications
- Advanced Proteomics Techniques and Applications
- Mass Spectrometry Techniques and Applications
- Lanthanide and Transition Metal Complexes
- Organoselenium and organotellurium chemistry
- Metal complexes synthesis and properties
- Supramolecular Chemistry and Complexes
- Conducting polymers and applications
- Electrochemical Analysis and Applications
- Analytical Chemistry and Chromatography
- Electrocatalysts for Energy Conversion
- Catalytic Processes in Materials Science
Rede de Química e Tecnologia
2015-2024
Associação Científica Proteomass
2015-2024
Universidade Nova de Lisboa
2014-2024
Clovis Oncology (United States)
2015-2023
Laboratório Associado para a Química Verde
2019
University of Lisbon
2013-2018
Universidade de São Paulo
2013-2016
Universidade de Vigo
2010-2013
The global increase in multidrug-resistant bacteria poses a challenge to public health and requires the development of new antibacterial materials. In this study, we examined bactericidal properties mesoporous silica-coated silver nanoparticles, varying core sizes (ca. 28 nm 51 nm). We also investigated gold nanoparticles 26 nm) coated with silica as possible inert metal cores. To investigate modification antimicrobial activity after surface charge change, used shell 16 functionalized...
Polarity-sensitive dansyl derivatives L1 and L2 were synthesized their ability to sense pollutant metal ions was investigated. All compounds found be highly sensitive towards Cu2+ Hg2+ ions, while being able detect quantify concentrations as low 2.5 μM. Both exhibit positive solvatofluorochromic behaviour, modulated in the presence of water, which turn results fluorescence enhancement via aggregation-induced emission (AIE). Seeking stability water solubility, luminescent L1-based...
Corrole macrocycles are very appealing dyes for incorporation into light harvesting devices. This work shows the sensorial ability of 5,10,15-tris(pentafluorophenyl)corrole 1 and its monoanionic species toward Na+, Ca2+, Cu2+, Cd2+, Pb2+, Hg2+, Ag+, Al3+ metal ions in toluene acetonitrile. The photophysical studies were carried out by absorption emission spectroscopy. From all studied, corrole to be colorimetric Hg2+ allowing a naked-eye detection through change color from purple blue...
In this work, the successful preparation and characterization of gold nanorods (AuNRs) coated with a mesoporous silica shell (AuNRs@Simes) was achieved. Conjugation methylene blue (MB) as model drug using ultrasound-stimulated loading has been explored for further application in light-mediated antibacterial studies. Lyophilization conjugated nanosystem analyzed trehalose (TRH) cryogenic protector. The obtained stable dry formulation shows potent antimicrobial activity against Gram-negative...
Two novel fluorescent probes bearing a single (P) and two (a podand-like structure, L) pyrene units derived from 1,5-bis(2-aminophenoxy)-3-oxopentane have been synthesized investigated in dioxane using UV–vis absorption, steady-state time-resolved (in picosecond time scale) emission spectroscopy; the gas phase, matrix-assisted laser desorption ionization mass spectrometry was employed. In dioxane, absorption spectra of P present unique band with maxima at 361 392 nm, which associated monomer...
Lung cancer is one of the leading causes death worldwide. Therefore, it extreme importance to develop new systems that can deliver anticancer drugs into site action when initiating a treatment. Recently, use nanotechnology and particle engineering has enabled development drug delivery platforms for pulmonary delivery. In this work, POXylated strawberry-like gold-coated magnetite nanocomposites ibuprofen (IBP) were encapsulated chitosan matrix using Supercritical Assisted Spray Drying (SASD)....
Gold nanostars with tuneable optical properties are synthesized via a seed-mediated approach employing adenosine monophosphate (AMP) as capping ligand. AMP directs the reduction of gold salt and mediates anisotropic nanoparticle growth.
Iron is the most abundant element by mass in Earth. Despite being an inexpensive material used a wide range of applications, its role as reducing agent for synthesis plasmonic nanoparticles has not been explored detail. In present work, we have studied use iron(II) sulfate green reductant gold (AuNPs) absence or presence different molecules. First, demonstrate that iron(II), any additive capping agent, able to reduce Au(III) generate AuNPs. However, reduction yield 100% and obtained NPs are...
The global increase in multidrug-resistant bacteria poses a challenge to public health and requires the development of new antibacterial materials. In this study, we examined bactericidal properties mesoporous silica-coated silver nanoparticles, varying core sizes (28 nm 51 nm). We also investigated gold nanoparticles (26 nm) coated with silica coating as possible inert metal cores. To investigate modification antimicrobial activity after surface charge change, used 28 shell (16...
We present a seed-mediated synthesis method for producing silver nanoplates (AgNPTs) with customizable size and thickness, ensuring high yield precise optical properties. This approach leverages ethylenediaminetetraacetic acid (EDTA) as key component in the process, utilizing small single-crystal seeds. The interaction between Ag+ ions EDTA at varying pH levels dynamically regulates complexation reduction kinetics during seed overgrowth, leading to formation of truncated superior responses....
Abstract Invited for this month's cover picture is the BIOSCOPE group of Professors Carlos Lodeiro and José Luis Capelo at REQUIMTE/UCIBIO‐LAQv‐FCT University NOVA Lisbon (Portugal), their collaborators. The devoted to Translational Research, shows Portuguese Flag represented by interaction between cells Janus gold/silver nanoparticles functionalized with rhodamine (red) Fluorescein (green) dyes as tools biomedical translational research. Read full text Review 10.1002/open.201700135 .
Abstract A new synthetic methodology of water‐soluble gold and silver nanoparticles (AuNPs@TC AgNPs@TC), using the antibiotic tetracycline (TC) as co‐reducing stabilizing agent, is reported. Both colloids exhibit high water stability. The average sizes obtained were 25±10 15±5 nm, respectively. composites tested against TC‐resistant bacteria, presenting an increasing antibacterial effect in case AgNPs@TC. sensing towards metal ions was also explored. An interesting reversible affinity...
Bimetallic nanostructures composed of gold (Au) and palladium (Pd) have garnered increased interest for their applications in heterogeneous catalysis. This study reports a simple strategy manufacturing Au@Pd bimetallic branched nanoparticles (NPs), which offer tunable optical response, using polyallylamine-stabilized AuNPs as template cores Pd overgrowth. The content can be altered by manipulating the concentration PdCl42– ascorbic acid (AA) that are injected, permit an overgrowth shell up...
Non-viral gene delivery using exogenous microRNAs is a potential strategy for fighting cancers with poor prognosis and which lack specific therapies, such as triple-negative breast cancer (TNBC). Herein we report the synthesis of six nontoxic electrostatic polymeric nanocapsules (P1 to P6) microRNA in TNBC cells. 1H Nuclear Magnetic Resonance (NMR) spectroscopy Scanning Electron Microscopy (SEM) were used characterize nanopolyplexes, synthesized Poly(L-Lysine) hyaluronic acid (Ha). Studies...