204 documents found, page 1 of 21
Magneto-plasmonic bionanocomposites for on-site SERS detection of water contami...
Soares, Sofia F.; Silva, Nuno M. A. S.; Brenheiro, João; Fateixa, Sara; Daniel-da-Silva, Ana L.; Trindade, TitoMagneto-plasmonic nanosystems have emerged as important multifunctional structures for several sensing applications, including on-site water quality monitoring. In this scenario, these nanosystems can integrate magnetic assisted separation procedures associated with optical detection of water contaminants, by exploring the surface-enhanced Raman scattering effect (SERS). Among the several modalities proposed fo...
Extraction of platinum and palladium from aqueous solutions using ionic-liquid-...
Almeida, Joana C.; Cardoso, Celso E. D.; Neves, Márcia C.; Trindade, Tito; Freire, Mara G.; Pereira, EduardaPlatinum (Pt) and palladium (Pd) are noble metals with a high economic and strategic value in several technologies, including catalytic converters production. This work focused on the impact of three key variables on the performance of ionic liquid (IL)-modified magnetite nanoparticles (NPs) in removing Pt(IV) and Pd(II) from aqueous solutions, in which the optimal operational conditions were identified through...
Silica supported ionic liquids for the efficient and selective recovery of plat...
Almeida, Joana C.; Neves, Márcia C.; Trindade, Tito; Freire, Mara G.; Pereira, EduardaPlatinum (Pt) and palladium (Pd) are considered critical elements due to their scarcity and high demand for important technologies, namely, in automotive catalytic converters. Therefore, sustainable technologies that are able to selectively extract such metals from secondary sources are extremely important. This work focuses on the preparation and evaluation of silica gel modified with ionic liquids (ILs) as al...
Surface-enhanced Raman scattering detection of thiram and ciprofloxacin using c...
Martins, Natércia C. T.; Fateixa, Sara; Nogueira, Helena I. S.; Trindade, TitoFast detection of contaminants of emerging concern (CECs) in water resources is of great environmental interest. Ideally, sustainable materials should be used in water quality monitoring technologies implemented for such purposes. In this regard, the application of bio-based materials aimed at the fabrication of analytical platforms has become of great importance. This research merges both endeavors by explorin...
Application of nanoparticles in cancer treatment: a concise review
Sell, Mariana; Lopes, Ana Rita; Escudeiro, Maria; Esteves, Bruno; Monteiro, Ana R.; Trindade, Tito; Cruz-Lopes, LuísaTimely diagnosis and appropriate antitumoral treatments remain of utmost importance, since cancer remains a leading cause of death worldwide. Within this context, nanotechnology offers specific benefits in terms of cancer therapy by reducing its adverse effects and guiding drugs to selectively target cancer cells. In this comprehensive review, we have summarized the most relevant novel outcomes in the range of ...
Application of Nanoparticles in Cancer Treatment: A Concise Review
Sell, Mariana; Lopes, Ana Rita; Escudeiro, Maria; Esteves, Bruno; Monteiro, Ana R.; Trindade, Tito; Cruz-Lopes, LuísaTimely diagnosis and appropriate antitumoral treatments remain of utmost importance, since cancer remains a leading cause of death worldwide. Within this context, nanotechnology offers specific benefits in terms of cancer therapy by reducing its adverse effects and guiding drugs to selectively target cancer cells. In this comprehensive review, we have summarized the most relevant novel outcomes in the range of ...
Raman imaging studies on the stability of Paracetamol tablets under different s...
Fateixa, Sara; Mulandeza, Otílio; Nogueira, Helena I. S.; Trindade, TitoThe applicability of Raman imaging for pharmaceutics production ranges from the characterization of pharmaceutical formulations, kinetic processes in drug delivery to the rapid detection and identification of counterfeit drugs/contaminants. Acetaminophen (Paracetamol, APAP) is an analgesic and antipyretic drug and one of the most consumed medicines worldwide. On the other hand, the compound 4-aminophenol (4-AP)...
Magnetic nanosorbents of γ-polyglutamic acid for removing a β-blocker from water
Campos, Valquíria; Marques, Diego Gouveia; Nogueira, João; Amorim, Carlos O.; Daniel-da-Silva, Ana Luísa; Trindade, TitoMetoprolol is known as one of the most frequently used β-blockers to treat hypertension, however due to its widespread use and resistance to hydrolysis, concerning amounts of this medicine are found in surface waters, causing negative impacts on the environment and human health. To date, very few water treatment plants remove metoprolol due to the ineffectiveness of conventional procedures, thus indicating the ...
Arrays of graphene-quantum dots-supported DNA oligonucleotides as self-indicati...
Monteiro, Ana R.; Ramos, Catarina I. V.; Fateixa, Sara; Neves, Maria G. P. M. S.; Trindade, TitoThe functionalization of deoxyribonucleic acid (DNA) with nanomaterials is a promising strategy to optimize the loading and efficiency of drugs in targeted clinical therapies. Herein we report a novel approach to construct arrays comprising blue- (B) or aqua green- (AG) emitting ethylenediamine-modified graphene quantum dots (GQDs) and DNA oligonucleotides that are able to fold into different structures, namely...
Ratiometric nanothermometry via porphyrin inner filter effect applied to colloi...
Conceição, Pedro; Barata, Joana F. B.; Hernández-Rodríguez, Miguel A.; Lacerda, Paula S. S.; Neves, Maria G. P. M. S.; Carlos, Luís D.; Trindade, TitoThermal sensing at the nanoscale is an attracted research field with potential applications in disparate areas from micro/nanoelectronics to nanomedicine. One of the driving forces of the research in the area is the design and fabrication of ratiometric thermometers combining materials with distinct thermometric properties. In this work, we provide an example of the combination of 5,10,15,20-tetrakis(pentafluor...